Cooling Pajama Separates: Mix and Match Tops and Bottoms in NightCool
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What is Kottinu?
Cool-jams NightCool is made from Kottinu, our proprietary performance polyester microfiber. Like our everyday DayBasics microfabric, it is soft, lightweight, and breathable with a cotton-like feel. The difference is what happens when you sweat: Kottinu is engineered as a performance sleep fabric for people who sleep hot.
How Kottinu wicks sweat away (MST)
Kottinu uses our Moisture Transference System (MST), a three-step process built into the fabric. Ultra-fine microfibers pull sweat off your skin as it forms, spread it across the surface of the fabric, and let it evaporate quickly. As moisture evaporates it carries body heat with it, helping you stay dry and comfortable.
Odor control that is built in
NightCool fabric is finished with Bact-Out, a treatment that helps the fabric itself resist odor so your sleepwear stays fresher between washes.
Soft, durable, easy to care for
Kottinu keeps the soft, cotton-like feel you want from sleepwear without holding onto moisture the way cotton does. It resists pilling, holds its shape, machine washes easily, and dries quickly.
How to care for Kottinu
- Machine wash cold or warm with like colors, gentle cycle
- Skip fabric softener and dryer sheets, they coat the microfibers and can reduce wicking
- Tumble dry low or hang to dry, Kottinu dries fast
- No bleach
- Holds its shape and resists pilling wash after wash
Every NightCool piece is made by our original manufacturer, who we have trusted from day one to make the technical fabric that keeps you dry and cool.
Wake up cool and dry. The Cool-jams Women's NightCool Scoop T-Shirt is a cooling sleep shirt built for hot sleepers and for nights when you run warm. This moisture-wicking sleep shirt is made from our proprietary Kottinu fabric, which pulls perspiration off your skin and dries fast, so you stay comfortable all night.
Part of the Cool-jams NightCool collection of cooling sleepwear for women.
More about the Scoop T-Shirt
The Cool-jams NightCool Scoop T-Shirt is a short sleeve cooling sleep tee for women who sleep hot. The scoop neckline leaves the throat open and the Kottinu knit wicks perspiration off the skin and dries fast, with an odor-control finish that helps the fabric stay fresher between washes. It is cut relaxed through the body so it does not cling, and it is finished like a normal tee, which is why customers wear it for travel as well as sleep. Five colors, in sizes S to 3X.
Can I wear this as a regular t-shirt?
Yes. It is cut and finished like a normal tee, so plenty of customers wear it for travel and everyday wear as well as sleep.
What bottoms go with it?
Any NightCool bottom: pants, capris, joggers or shorts. The range is sold as separates so you can size each piece.
What is Kottinu fabric?
Kottinu is our proprietary performance sleep fabric, used across the NightCool line. It wicks moisture off the skin as it forms and dries fast.
Wake up cool and dry. The Cool-jams Women's NightCool Pleated T-Shirt is a cooling sleep shirt built for hot sleepers and for nights when you run warm. This moisture-wicking sleep shirt is made from our proprietary Kottinu fabric, which pulls perspiration off your skin and dries fast, so you stay comfortable all night.
Part of the Cool-jams NightCool collection of cooling sleepwear for women.
More about the Pleated T-Shirt
The Cool-jams NightCool Pleated T-Shirt is a short sleeve cooling pajama top made for night sweats and hot flashes, with a soft pleat at the front that gives the fabric somewhere to fall so it skims the stomach rather than sitting against it. The Kottinu knit wicks sweat off the skin and dries fast, and an odor-control finish helps the fabric stay fresher between washes. The shoulder and sleeve sit close while the body falls away from the pleat. Five colors, in sizes S to 3X.
What does the pleat do?
It releases fabric across the front so the top drapes away from the body. People who dislike a close-fitting tee usually prefer this cut.
Is this top loose or fitted?
Relaxed. The shoulder and sleeve sit close, and the body falls away from the pleat.
Is it good for night sweats?
Yes, it is cut from the same Kottinu fabric as the whole NightCool line, which wicks moisture and dries fast.
Wake up cool and dry. The Cool-jams Women's NightCool V-Neck Top is a cooling sleep top built for hot sleepers and for nights when you run warm. This moisture-wicking sleep top is made from our proprietary Kottinu fabric, which pulls perspiration off your skin and dries fast, so you stay comfortable all night.
Part of the Cool-jams NightCool collection of cooling sleepwear for women.
More about the V-Neck Top
The Cool-jams NightCool V-Neck Top is a short sleeve cooling pajama top built around an open V neckline that leaves the throat and upper chest uncovered, which is what many women want on hot flash nights. The Kottinu knit wicks perspiration as it forms and dries fast, and an odor-control finish helps the fabric stay fresher between washes. The body is cut relaxed so it keeps fabric off the skin. Designed to mix with any NightCool bottom, in Black, Navy and Merlot, in sizes S to 3X.
Is a V-neck cooler than a crew neck?
It leaves more of the throat and upper chest uncovered, which is where many women notice a hot flash start, so most people find it feels cooler.
What bottoms go with this top?
Any NightCool bottom: pants, capris, joggers or shorts. The range is sold as separates so you can size each piece.
What colors does it come in?
Black, Navy and Merlot, in sizes S through 3X.
Wake up cool and dry. The Cool-jams Women's NightCool Scoop Neck T-Shirt with 3/4 Sleeves is a cooling sleep shirt built for hot sleepers and for nights when you run warm. This moisture-wicking sleep shirt is made from our proprietary Kottinu fabric, which pulls perspiration off your skin as it forms and dries fast, so you stay comfortable all night.
Part of the Cool-jams NightCool collection of cooling sleepwear for women.
More about the Scoop Neck T-Shirt - 3/4 Sleeves
The Cool-jams NightCool Scoop Neck T-Shirt with 3/4 Sleeves is made for warm sleepers and warm nights that do not stay one temperature. The three-quarter sleeve covers the upper arm and stops clear of the wrist, so you are not pushing fabric up all night, and the scoop neck keeps the chest open. Kottinu fabric wicks sweat and dries fast, and an odor-control finish helps the fabric stay fresher between washes. Designed to mix with any NightCool bottom, in Black, Navy and Merlot, in sizes S to 3X.
What is a 3/4 sleeve?
It ends between the elbow and the wrist, covering the upper arm while leaving the forearm free.
Is this warmer than the short sleeve version?
Slightly, because of the extra sleeve, but the fabric is identical and still wicks and dries fast.
Does it match the NightCool bottoms?
Yes, the solid colors are shared across the NightCool range so tops and bottoms can be mixed.
Wake up cool and dry. The Cool-jams Women's NightCool Long Sleeve T-Shirt is a cooling sleep shirt built for hot sleepers and for nights when you run warm. This moisture-wicking sleep shirt is made from our proprietary Kottinu fabric, which pulls perspiration off your skin and dries fast, so you stay comfortable all night.
Part of the Cool-jams NightCool collection of cooling sleepwear for women.
More about the Long Sleeve T-Shirt
The Cool-jams NightCool Long Sleeve T-Shirt covers the arms without the heat that usually follows, which is the whole point when you run hot at night but the room is cold. The Kottinu knit is temperature-regulating: it wicks sweat off the skin, dries fast and keeps air moving through the sleeve. An odor-control finish helps the fabric stay fresher between washes. It is a lightweight knit cut relaxed through the body, so it layers under a robe or over a tank without bulk. In Black, Navy and Merlot, in sizes S to 3X.
Why wear long sleeves if I sleep hot?
Rooms and bodies do not always agree. A long sleeve in a fast-drying knit gives you coverage when the room is cold and keeps working if you warm up during the night.
Is this a top or a nightshirt?
It is a t-shirt style top, cut to be worn with a separate bottom. If you want a one-piece knee-length shirt, see the NightCool nightshirts.
Is it thin enough to layer?
Yes. It is a lightweight knit that layers under a robe or over a tank without bulk.
Wake up cool and dry. The Cool-jams Women's NightCool Tulip Tank Top is a cooling tank top built for hot sleepers and for nights when you run warm. This moisture-wicking tank top is made from our proprietary Kottinu fabric, which pulls perspiration off your skin and dries fast, so you stay comfortable all night.
Part of the Cool-jams NightCool collection of cooling sleepwear for women.
More about the Tulip Tank Top
The Cool-jams NightCool Tulip Tank Top is a cooling tank top for women who sleep hot, finished with an overlapping tulip hem that falls softly over the hip rather than cutting straight across it. It is sleeveless with a scoop neckline, so there is very little fabric holding heat, and the Kottinu knit wicks sweat and dries fast. An odor-control finish helps the fabric stay fresher between washes. Wear it to sleep or to lounge, in Violet, Navy and Island, in sizes S to 3X.
Is a tank top enough on a hot night?
For most hot sleepers it is the coolest top we make, because it leaves the arms and shoulders bare and uses the least fabric.
Does the hem cover the waistband?
The tulip hem falls over the top of the hip and covers the waistband of matching NightCool bottoms.
Can I wear it out of the house?
Yes, the tulip hem and scoop neck read as a regular tank, so it works for lounging as well as sleep.
Wake up cool and dry. The Cool-jams Women's NightCool Capri Pants are cooling pajama pants built for hot sleepers and for nights when you run warm. These moisture-wicking pajama pants are made from our proprietary Kottinu fabric, which pulls perspiration off your skin and dries fast, so you stay comfortable all night.
Part of the Cool-jams NightCool collection of cooling sleepwear for women.
More about the Capri Pajama Pants
The Cool-jams NightCool Capri Pants are cropped cooling pajama pants made for night sweats and hot flashes. The mid-calf length leaves the lower leg free, which is where a lot of heat escapes, while still covering more than shorts. You choose the waist when you order, elastic or drawstring, so the fit suits you rather than the pattern. The moisture wicking Kottinu fabric pulls sweat off the skin and dries fast, and an odor-control finish helps the fabric stay fresher between washes. Five colors, in sizes S to 3X.
Can I choose the waistband?
Yes. This style is sold with a choice of elastic or drawstring waist, selected when you order.
Why capris instead of full-length pajama pants?
Leaving the lower leg uncovered vents heat, so capris suit people who want more than shorts but find full-length pants too warm.
Can I mix these with other Cool-jams tops?
Yes. The NightCool bottoms and tops are sold separately and made to be mixed, so you can size each piece independently.
Wake up cool and dry. The Cool-jams Women's NightCool Pants are cooling pajama pants built for hot sleepers and for nights when you run warm. These moisture-wicking pajama pants are made from our proprietary Kottinu fabric, which pulls perspiration off your skin and dries fast, so you stay comfortable all night.
Part of the Cool-jams NightCool collection of cooling sleepwear for women.
More about the Pajama Pants
The Cool-jams NightCool Pants are full-length cooling pajama pants for hot sleepers who still want their legs covered. The Kottinu knit wicks sweat off the skin and dries fast, so full-length coverage does not turn into overheating, and an odor-control finish helps the fabric stay fresher between washes. You choose the waist when you order, elastic or drawstring. They are cut straight through the leg with enough room to move, and they pair with any NightCool top since the range is sold as separates. Five colors, in sizes S to 3X.
Can I choose the waistband?
Yes. This style is sold with a choice of elastic or drawstring waist, selected when you order.
Are full-length pajama pants too hot for night sweats?
Not when the fabric moves moisture. Kottinu is a performance sleep knit that wicks and dries fast, so these stay comfortable where cotton pants would stay damp.
What tops go with them?
Any NightCool top. The range is sold as separates, so you can size the top and the bottom differently.
Wake up cool and dry. The Cool-jams Women's NightCool Shorts are cooling sleep shorts built for hot sleepers and for nights when you run warm. These moisture-wicking sleep shorts are made from our proprietary Kottinu fabric, which pulls perspiration off your skin and dries fast, so you stay comfortable all night.
Part of the Cool-jams NightCool collection of cooling sleepwear for women.
More about the Pajama Shorts
The Cool-jams NightCool Shorts are cooling pajama shorts made for night sweats, and one of the lightest bottoms in the NightCool range, which makes them a usual choice for the warmest nights. You choose the waist when you order, elastic or drawstring. The Kottinu knit wicks sweat off the skin and dries fast, and an odor-control finish helps the fabric stay fresher between washes. Pair them with a NightCool tank or tee for the lightest full set. In Black, Navy and Merlot, in sizes S to 3X.
Can I choose the waistband?
Yes. This style is sold with a choice of elastic or drawstring waist, selected when you order.
Are shorts the coolest option for night sweats?
They put very little fabric on your legs. Pair them with a NightCool tank for one of the lightest full sets we make.
What tops match them?
Any NightCool top. The range is sold as separates so tops and bottoms can be sized independently.
Wake up cool and dry. The Cool-jams Women's NightCool Elastic Waist Tulip Shorts are cooling sleep shorts built for hot sleepers and for nights when you run warm. These moisture-wicking sleep shorts are made from our proprietary Kottinu fabric, which pulls perspiration off your skin and dries fast, so you stay comfortable all night.
Part of the Cool-jams NightCool collection of cooling sleepwear for women.
More about the Elastic Waist Tulip Shorts
The Cool-jams NightCool Elastic Waist Tulip Shorts use an overlapping tulip hem, where the panels cross at the outer thigh so the leg opening is wider and moves more freely than a closed straight hem. They are a good pick for anyone who overheats at night and finds a straight-cut sleep short restrictive. The waist is elastic, and the Kottinu knit wicks sweat and dries fast, with an odor-control finish that helps the fabric stay fresher between washes. In Violet, Navy and Island, in sizes S to 3X.
What is a tulip hem?
The hem overlaps at the outer thigh like the petals of a tulip, so the leg opening is wider and moves more freely than a closed straight hem.
What top goes with these?
The NightCool Tulip Tank Top is the matching piece, and any NightCool top works since the range is designed to mix.
What sizes do they come in?
Sizes S through 3X, in Violet, Navy and Island.
Wake up cool and dry. The Cool-jams Women's NightCool Elastic Waist Cuff Jogger Pants are cooling pajama pants built for hot sleepers and for nights when you run warm. These moisture-wicking pajama pants are made from our proprietary Kottinu fabric, which pulls perspiration off your skin and dries fast, so you stay comfortable all night.
Part of the Cool-jams NightCool collection of cooling sleepwear for women.
More about the Elastic Waist Cuff Jogger Pants
The Cool-jams NightCool Elastic Waist Cuff Jogger Pants take the jogger shape into sleepwear: a covered elastic waist, a relaxed leg and a cuffed ankle so the hem stays where you put it. That cuff is what people like when they run hot at night, because the leg can be pushed up and stays up. The Kottinu knit wicks sweat and dries fast, and an odor-control finish helps the fabric stay fresher between washes. Five colors, in sizes S to 3X.
Are cuffed joggers hotter than straight pajama pants?
Not usually, and many people find them cooler in practice because you can push the cuff up your calf and it stays there instead of falling back down.
Is the cuff tight on the ankle?
It is a soft cuff with give. It holds the hem without gripping.
Can I wear these as loungewear?
Yes, the jogger shape is the most street-ready cut in the NightCool range and works for lounging at home.
Wake up cool and dry. The Cool-jams Women's NightCool Drawstring Waist Wide Leg Pants are cooling pajama pants built for hot sleepers and for nights when you run warm. These moisture-wicking pajama pants are made from our proprietary Kottinu fabric, which pulls perspiration off your skin and dries fast, so you stay comfortable all night.
Part of the Cool-jams NightCool collection of cooling sleepwear for women.
More about the Drawstring Waist Wide Leg Pants
The Cool-jams NightCool Drawstring Waist Wide Leg Pants are cut generously through the leg, which is the point: a wide leg moves air with you instead of sitting against the skin, so they suit women who sleep hot. The drawstring waist lets you set the fit exactly. The Kottinu knit wicks sweat and dries fast, and an odor-control finish helps the fabric stay fresher between washes. This style comes in combined sizes, S-M, L-XL and 2X-3X, in Violet and Black.
How do the combined sizes work?
This style comes in S-M, L-XL and 2X-3X rather than single sizes. The drawstring waist and the wide leg give the range within each size, so you adjust rather than sizing exactly.
Why a wide leg for sleepwear?
Air moves through a wide leg as you move, which helps if you overheat. It also means nothing grips the calf or thigh when you turn over.
Can I wear these outside the bedroom?
Many customers wear them as lounge pants. The drawstring waist and clean drape read as loungewear rather than obvious pajamas.
Wake up cool and dry. The Cool-jams Men's NightCool Crew Neck T-Shirt is a men's cooling sleep shirt built for hot sleepers and for nights when you run warm. This men's moisture-wicking sleep shirt is made from our proprietary Kottinu fabric, which pulls perspiration off your skin and dries fast, so you stay comfortable all night.
Part of the Cool-jams NightCool collection of cooling sleepwear for men.
More about the Crew Neck T-Shirt
The Cool-jams NightCool Crew Neck T-Shirt is a cooling sleep t-shirt for men with night sweats. The Kottinu knit pulls perspiration off the skin as it forms and dries fast, so the shirt does not stay wet against your back, and an odor-control finish helps the fabric stay fresher between washes. It is cut as a standard crew neck tee, relaxed through the body and shoulder, which is why customers wear it for travel and the gym as well as for sleep. In Navy and Black, in sizes M to 2X.
Can I wear this outside bed?
Yes. It is cut like a normal crew neck tee, and the fabric performs the same way in a gym or on a plane as it does in bed.
Is it good for night sweats?
That is what it was built for. Kottinu wicks moisture off the skin and dries fast, which is the property that matters when you sweat in your sleep.
What bottoms match it?
The NightCool Pants and the NightCool Boxer Shorts in the men's range.
Wake up cool and dry. The Cool-jams Men's NightCool Tank Top is a men's cooling sleep shirt built for hot sleepers and for nights when you run warm. This moisture-wicking sleep shirt is made from our proprietary Kottinu fabric, which pulls perspiration off your skin and dries fast, so you stay comfortable all night.
Part of the Cool-jams NightCool collection of cooling sleepwear for men.
More about the Tank Top
The Cool-jams NightCool Tank Top is a sleeveless cooling sleep tank for men who run hot at night. It is the lightest top in the men's NightCool range, leaving the arms and shoulders bare, and the Kottinu knit wicks sweat off the skin and dries fast. An odor-control finish helps the fabric stay fresher between washes. It is cut relaxed through the body with a standard tank armhole, so it is easy to sleep in and easy to layer. In Navy and Black, in sizes M to 2X.
Is a tank the coolest option for men?
It is the lightest top we make for men, because it removes the sleeves entirely. Pair it with NightCool Boxer Shorts for the coolest combination.
Is the armhole cut low?
It is a standard tank armhole, not a dropped or cut-away athletic armhole.
What bottoms match it?
The NightCool Pants and the NightCool Boxer Shorts in the men's range.
Wake up cool and dry. The Cool-jams Men's NightCool Boxer Shorts are men's cooling boxer shorts built for hot sleepers and for nights when you run warm. These moisture-wicking boxer shorts are made from our proprietary Kottinu fabric, which pulls perspiration off your skin and dries fast, so you stay comfortable all night.
Part of the Cool-jams NightCool collection of cooling sleepwear for men.
More about the Boxer Shorts
The Cool-jams NightCool Boxer Shorts are cooling sleep boxers for men with night sweats. The Kottinu knit wicks perspiration off the skin as it forms and dries fast, which is the difference between waking up damp and waking up comfortable, and an odor-control finish helps the fabric stay fresher between washes. The waistband is soft and elastic, the leg is cut roomy, and there is no bunching at the thigh when you turn over. In Navy and Black, in sizes M to 2X.
Are these underwear or sleepwear?
They are cut as sleep boxers, designed to be worn on their own in bed. The roomier leg and soft waistband are built for sleeping rather than for wearing under trousers.
Do men get night sweats too?
Yes, and it is common. These are cut from the same Kottinu performance fabric as our women's night sweat range.
What top goes with them?
The NightCool Crew Neck T-Shirt and the NightCool Tank Top are the matching pieces in the men's range.
Wake up cool and dry. The Cool-jams Men's NightCool Pants are men's cooling pajama pants built for hot sleepers and for nights when you run warm. These moisture-wicking pajama pants are made from our proprietary Kottinu fabric, which pulls perspiration off your skin and dries fast, so you stay comfortable all night.
Part of the Cool-jams NightCool collection of cooling sleepwear for men.
More about the Pajama Pants
The Cool-jams NightCool Pants are cooling pajama pants for men who run hot at night and still want full-length coverage. The Kottinu knit wicks sweat off the skin and dries fast, so covered legs do not mean an overheated night, and an odor-control finish helps the fabric stay fresher between washes. The waistband is soft and elastic, and the leg is cut straight with room to move. It is designed to be worn with the NightCool Crew Neck T-Shirt or Tank Top, both cut from the same fabric. In Black and Navy, in sizes M to 2X.
Are full-length pants too warm if I sleep hot?
Not in a performance knit. Kottinu moves moisture and keeps air flowing, so the length adds coverage without the heat you get from cotton or flannel.
What is the men's size range?
The men's NightCool range runs M through 2X.
What tops match them?
The NightCool Crew Neck T-Shirt and the NightCool Tank Top in the men's range.
Complete your set with DayBasics
Shop the halves on their own
Every piece in the builder
Women's NightCool tops
- Scoop T-Shirt $60
- Pleated T-Shirt $60
- V-Neck Top $60
- Scoop Neck T-Shirt - 3/4 Sleeves $60
- Long Sleeve T-Shirt $48
- Tulip Tank Top $60
Women's NightCool bottoms
- Capri Pants $70
- Pants $56
- Shorts $70
- Elastic Waist Tulip Shorts $42
- Elastic Waist Cuff Jogger Pants $70
- Drawstring Waist Wide Leg Pants $42New this season
Men's NightCool tops
- Crew Neck T-Shirt $60
- Tank Top $60
Men's NightCool bottoms
- Boxer Shorts $70
- Pants $56
Sets that fit both halves
Most pajama sets make you take one size for both pieces. So you size up for the top and swim in the bottoms, or the other way round, and eventually you stop buying sets at all.
Here the top and the bottom are picked separately. Choose a Large top and a Medium bottom. It is still one set, at the set price, with no surcharge for mixing, and the automatic discount applies the same way.
Can you buy pajama tops and bottoms in different sizes?
Yes. Every set on this page is built from separates, so you choose the top, the bottom, and a size for each. A Medium top with Large bottoms is one full set at the set price.
How do you build a cooling pajama set?
Start with the bottom you actually sleep in. Pants, capris, shorts, joggers and wide leg all use the same Cooling Pajama Separates: Mix and Match Tops and Bottoms in NightCool fabric, so the choice is about how covered you want to be, not how cool the fabric is. Then pick your top.
What should I wear to bed when I wake up drenched?
Cooling Pajama Separates: Mix and Match Tops and Bottoms in NightCool is a technical knit made for night sweats and hot flashes. Ultra-fine microfibers move sweat off your skin and spread it across the surface of the fabric so it dries fast, which keeps you from lying in a wet shirt.
Night sweats, whatever the cause
Menopause and perimenopause, and also surgery recovery, medication and treatment. The fabric does not care why you are hot.
How does the set saving work?
There is no code to enter. Build a set, add it to the cart, and the saving applies at checkout: 14% off one set, 18% off two, 19% off three, 21% off four. Women's and men's sets count together toward the same ladder.
| Sets | You save |
|---|---|
| 1 | 14% |
| 2 | 18% |
| 3 | 19% |
| 4 | 21% |
Questions, answered
Build a cooling pajama set from any NightCool top and bottom and the discount applies automatically at checkout: $10 off one set, $25 off two, $40 off three, and $60 off four. Women's and men's sets count together toward the same ladder, so a his-and-hers order of two sets still saves $25. No code needed.
Yes. Every NightCool set is built from separates, so you pick the exact size for your top and the exact size for your bottom. A Medium top with Large bottoms counts as one full set and earns the same automatic discount.
Most NightCool styles run from S to 3XL for both women's and men's pieces. Tops and bottoms are sized separately, so you can mix sizes freely, and each style's size chart lists exact garment measurements.
Yes. The set builder covers both women's and men's cooling pajamas, and you can build one of each in the same order. Both count toward the same savings ladder, so two sets in one order save $25 at checkout no matter whose they are.
Yes. Every NightCool piece is sold separately at its regular price, and the set builder page has quick add buttons for single pieces. The set discount applies automatically once your order contains both a NightCool top and bottom.
Set savings are automatic, so there is no code to enter, and they do not combine with other product or order discount codes. Free shipping still applies on top of your set savings for contiguous U.S. orders over $120 after discounts.
Every piece in a NightCool set is made from Kottinu, our proprietary performance polyester microfiber, a technical synthetic first made for firefighter base layers and medical scrubs, now crafted into cooling sleepwear for people who sleep hot. Full details are in the Fabric and technology section of the set builder page.
Yes, and the fabric is what does the work. Ultra-fine microfibers pull sweat off your skin, spread it across the surface of the fabric, and let it evaporate, and as moisture evaporates it carries body heat with it. That is what makes a NightCool set a cooling pajama set rather than ordinary loungewear.
Yes. Breathability comes from how a fabric is constructed, not just the fiber it is made from. Kottinu, our technical synthetic (engineered polyester microfiber), is knit from ultra-fine filaments into a lightweight, airy fabric, so air moves through it and sweat evaporates instead of soaking in. That construction is exactly why we chose it for warm sleepers.
Cotton feels great until you sweat; then it absorbs moisture and can stay damp against your skin. NightCool fabric moves moisture to the surface where it can evaporate, so the fabric stays drier. If you regularly wake up warm, that difference is the reason to choose a moisture wicking sleepwear set over cotton.
Soft, lightweight, and smooth with a cotton-like feel, closer to a favorite tee than to a slick athletic fabric.
NightCool fabric is finished with Bact-Out, an odor-control treatment that helps the fabric itself resist odor, so your sleepwear stays fresher between washes.
Machine wash cold or warm with like colors on a gentle cycle, then tumble dry low or hang to dry. Skip fabric softener, dryer sheets, and bleach; softeners coat the microfibers and can reduce wicking. Kottinu holds its shape and resists pilling wash after wash.
Cool-jams orders in the contiguous U.S. ship with economy or standard ground service, 5 to 10 business days in transit, with expedited (3 to 5) and express (1 to 2) options at checkout. Alaska, Hawaii, U.S. territories, and military addresses run 6 to 10 business days for standard ground, with the same expedited and express options. See our shipping policy for details.
Contiguous U.S. orders over $120 after discounts qualify for free economy shipping. Below that, ground, expedited, and express rates are shown at checkout. Alaska and Hawaii are not eligible for free shipping; standard ground, expedited, and express service is available.
Yes. On eligible orders, Shop Pay splits your purchase into 4 interest-free payments at checkout.
We arrange international orders by email. Contact our customer service team and we will confirm shipping costs for your country before you order.
Returns must reach our warehouse within 30 days of the purchase date, and sleepwear needs to be unworn, unwashed, fragrance-free, and with original tags attached, so try your set on before wearing or washing it. Refunds go to your original payment method, less the $7.95 return label fee, and original shipping charges are not refundable. Holiday purchases made in October through December can be returned through January 16.
Yes, you can return part of an order. If your return breaks up a set, the set discount may be adjusted in line with our volume discount policy, since the discount is earned by the pieces that stay in your order. Standard return rules apply.
Check the size charts before you order, and remember your top and bottom are sized independently. If the fit still is not right, exchange for a different size or color; exchanges come with a complimentary prepaid return label. Start from our returns page and choose exchange.
Yes. NightCool fabric is lightweight and breathable rather than insulating, and it layers easily under a robe or an extra blanket on cold nights. If you sleep warm year-round, the fabric works the same way in every season.
NightCool is Cool-jams' performance sleepwear line for people who sleep warm. The set builder covers women's and men's styles in sizes S to 3XL, and every set is mix and match, so you choose the exact top, bottom, and sizes that suit how you sleep.
