Black Cool-jams NightCool Boxer Shorts for men

Black Cool-jams NightCool Boxer Shorts for men, side view, cooling sleepwear for men

Black Cool-jams NightCool Boxer Shorts for men, back view, for men who run hot at night

Navy Cool-jams NightCool Boxer Shorts for men, temperature-regulating sleep fabric

Navy Cool-jams NightCool Boxer Shorts for men, lifestyle view

Black Cool-jams NightCool Boxer Shorts for men, cooling sleepwear for men

Black Cool-jams NightCool Boxer Shorts for men, lifestyle view, for men who run hot at night

Navy Cool-jams NightCool Boxer Shorts for men, lifestyle view, temperature-regulating sleep fabric

Black Cool-jams NightCool Boxer Shorts for men, lifestyle view

4.8

Rated 4.8 out of 5 stars

75 Reviews

$70

Color: Navy

Navy

Black

Size:

Size chart

Size guide

Measure your body and find the band you fall into. Between two sizes, we suggest sizing up, because sleepwear is more comfortable a little looser.

Your measurement	S	M	L	XL	XXL	XXXL
Waist	24–26	26.5–28	28.5–31	31.5–34	34.5–37	37.5–40
Hip	38.5–41	41.5–43.5	44–46.5	47–49.5	50–52.5	53–55.5
Thigh	23.5–25	25.5–26.5	27–28	28.5–29.5	30–31	31.5–32.5

Body measurements, in inches. Dress and international sizes are size labels, so they do not change with the unit switch.

Garment laid flat and measured across. Not body measurements. Compare these with a garment you already own that fits you well.

Garment	S	M	L	XL	XXL	XXXL
Waist	14	15	16.5	18	19.5	21
Hip	21.5	22.875	24.25	25.75	27.25	28.75
Thigh	13.75	14.5	15.25	16	16.75	17.5
Leg Opening	12.75	13.5	14.25	15	15.75	16.5
Front Rise	12.75	13.25	13.75	14.25	14.75	15.25
Back Rise	16.75	17.25	17.75	18.25	18.75	19.25
Inseam	5.25	5.25	5.25	5.25	5.25	5.25
Outseam	17	17.5	18	18.5	19	19.5

Garment measurements, in inches.

XXL

In stock, ready to ship
Backordered, shipping soon

Free U.S. shipping on all orders $120+

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.

Why you'll love it

Relaxed, non-cling fit for natural airflow
Kottinu moisture-wicking fabric that wicks perspiration and dries quickly, engineered for hot sleepers and night sweats
Soft, cotton-like feel that resists pilling and holds its shape
Bact-Out finish helps the fabric stay fresher between washes
Mix-and-match with any NightCool top

What is Kottinu?

Kottinu, a technical synthetic (engineered polyester microfiber) made for firefighter base layers and medical scrubs, now crafted for hot sleepers and night sweats needing moisture-wicking and cooling pajamas. Soft and smooth with a cotton-like feel, it pulls sweat off your skin, dries fast, carrying body heat away with it.

A Bact-Out finish helps the fabric resist odor, so it stays fresher between washes. Kottinu resists pilling, holds its shape, and machine washes easily.

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

Where it is made

Every NightCool piece is made in Thailand by the same factory partner Cool-jams has trusted since day one.

Shipping. Free on Continental U.S. orders over $120. Ships in about a business day, arrives in 3 to 7. We ship across the U.S. and Canada.
Returns. 30 days from delivery. Start at our Returns Center with your order number and print a prepaid label. Gifts without an order number, orders from outside the U.S., and anything faulty: email [email protected].
Exchanges. Free within the same 30 days, no admin fee.
Refunds. Full-price store credit with no fee, or your original payment method less a $9.95 admin fee.
30-Night Cool Sleep Trial. Sleep in NightCool. Wash it. Not right? Send it back within 30 nights for store credit or a refund.
DayBasics is Final Sale. No returns or exchanges as we retire the collection.
Read the full returns and exchanges policy.

[{"id":45047155327085,"title":"Navy \/ M","option1":"Navy","option2":"M","option3":null,"sku":"8698043952100105","requires_shipping":true,"taxable":true,"featured_image":{"id":39250491965549,"product_id":8051038847085,"position":4,"created_at":"2026-08-24T21:54:26-07:00","updated_at":"2026-08-27T07:08:28-07:00","alt":"Navy Cool-jams NightCool Boxer Shorts for men, temperature-regulating sleep fabric","width":2048,"height":2048,"src":"\/\/www.cool-jams.com\/cdn\/shop\/files\/nightcool-mens-boxer-shorts-navy-front-01.png?v=1787839708","variant_ids":[45047155327085,45047155359853,45047155392621,45047155425389]},"available":true,"name":"Men's NightCool Boxer Shorts - Navy \/ M","public_title":"Navy \/ M","options":["Navy","M"],"price":7000,"weight":0,"compare_at_price":null,"inventory_management":"shopify","barcode":"8698043952100105","featured_media":{"alt":"Navy Cool-jams NightCool Boxer Shorts for men, temperature-regulating sleep fabric","id":29805821165677,"position":4,"preview_image":{"aspect_ratio":1.0,"height":2048,"width":2048,"src":"\/\/www.cool-jams.com\/cdn\/shop\/files\/nightcool-mens-boxer-shorts-navy-front-01.png?v=1787839708"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":45047155359853,"title":"Navy \/ L","option1":"Navy","option2":"L","option3":null,"sku":"8698043952100106","requires_shipping":true,"taxable":true,"featured_image":{"id":39250491965549,"product_id":8051038847085,"position":4,"created_at":"2026-08-24T21:54:26-07:00","updated_at":"2026-08-27T07:08:28-07:00","alt":"Navy Cool-jams NightCool Boxer Shorts for men, temperature-regulating sleep fabric","width":2048,"height":2048,"src":"\/\/www.cool-jams.com\/cdn\/shop\/files\/nightcool-mens-boxer-shorts-navy-front-01.png?v=1787839708","variant_ids":[45047155327085,45047155359853,45047155392621,45047155425389]},"available":true,"name":"Men's NightCool Boxer Shorts - Navy \/ L","public_title":"Navy \/ L","options":["Navy","L"],"price":7000,"weight":0,"compare_at_price":null,"inventory_management":"shopify","barcode":"8698043952100106","featured_media":{"alt":"Navy Cool-jams NightCool Boxer Shorts for men, temperature-regulating sleep fabric","id":29805821165677,"position":4,"preview_image":{"aspect_ratio":1.0,"height":2048,"width":2048,"src":"\/\/www.cool-jams.com\/cdn\/shop\/files\/nightcool-mens-boxer-shorts-navy-front-01.png?v=1787839708"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":45047155392621,"title":"Navy \/ XL","option1":"Navy","option2":"XL","option3":null,"sku":"8698043952100107","requires_shipping":true,"taxable":true,"featured_image":{"id":39250491965549,"product_id":8051038847085,"position":4,"created_at":"2026-08-24T21:54:26-07:00","updated_at":"2026-08-27T07:08:28-07:00","alt":"Navy Cool-jams NightCool Boxer Shorts for men, temperature-regulating sleep fabric","width":2048,"height":2048,"src":"\/\/www.cool-jams.com\/cdn\/shop\/files\/nightcool-mens-boxer-shorts-navy-front-01.png?v=1787839708","variant_ids":[45047155327085,45047155359853,45047155392621,45047155425389]},"available":true,"name":"Men's NightCool Boxer Shorts - Navy \/ XL","public_title":"Navy \/ XL","options":["Navy","XL"],"price":7000,"weight":0,"compare_at_price":null,"inventory_management":"shopify","barcode":"8698043952100107","featured_media":{"alt":"Navy Cool-jams NightCool Boxer Shorts for men, temperature-regulating sleep fabric","id":29805821165677,"position":4,"preview_image":{"aspect_ratio":1.0,"height":2048,"width":2048,"src":"\/\/www.cool-jams.com\/cdn\/shop\/files\/nightcool-mens-boxer-shorts-navy-front-01.png?v=1787839708"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":45047155425389,"title":"Navy \/ XXL","option1":"Navy","option2":"XXL","option3":null,"sku":"8698043952100108","requires_shipping":true,"taxable":true,"featured_image":{"id":39250491965549,"product_id":8051038847085,"position":4,"created_at":"2026-08-24T21:54:26-07:00","updated_at":"2026-08-27T07:08:28-07:00","alt":"Navy Cool-jams NightCool Boxer Shorts for men, temperature-regulating sleep fabric","width":2048,"height":2048,"src":"\/\/www.cool-jams.com\/cdn\/shop\/files\/nightcool-mens-boxer-shorts-navy-front-01.png?v=1787839708","variant_ids":[45047155327085,45047155359853,45047155392621,45047155425389]},"available":true,"name":"Men's NightCool Boxer Shorts - Navy \/ XXL","public_title":"Navy \/ XXL","options":["Navy","XXL"],"price":7000,"weight":0,"compare_at_price":null,"inventory_management":"shopify","barcode":"8698043952100108","featured_media":{"alt":"Navy Cool-jams NightCool Boxer Shorts for men, temperature-regulating sleep fabric","id":29805821165677,"position":4,"preview_image":{"aspect_ratio":1.0,"height":2048,"width":2048,"src":"\/\/www.cool-jams.com\/cdn\/shop\/files\/nightcool-mens-boxer-shorts-navy-front-01.png?v=1787839708"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":45047155196013,"title":"Black \/ M","option1":"Black","option2":"M","option3":null,"sku":"8698043952100005","requires_shipping":true,"taxable":true,"featured_image":{"id":39250378719341,"product_id":8051038847085,"position":1,"created_at":"2026-08-24T21:24:42-07:00","updated_at":"2026-08-27T07:08:19-07:00","alt":"Black Cool-jams NightCool Boxer Shorts for men","width":2048,"height":2048,"src":"\/\/www.cool-jams.com\/cdn\/shop\/files\/nightcool-mens-boxer-shorts-black-front-01.png?v=1787839699","variant_ids":[45047155196013,45047155228781,45047155261549,45047155294317]},"available":true,"name":"Men's NightCool Boxer Shorts - Black \/ M","public_title":"Black \/ M","options":["Black","M"],"price":7000,"weight":0,"compare_at_price":null,"inventory_management":"shopify","barcode":"8698043952100005","featured_media":{"alt":"Black Cool-jams NightCool Boxer Shorts for men","id":29805713981549,"position":1,"preview_image":{"aspect_ratio":1.0,"height":2048,"width":2048,"src":"\/\/www.cool-jams.com\/cdn\/shop\/files\/nightcool-mens-boxer-shorts-black-front-01.png?v=1787839699"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":45047155228781,"title":"Black \/ L","option1":"Black","option2":"L","option3":null,"sku":"8698043952100006","requires_shipping":true,"taxable":true,"featured_image":{"id":39250378719341,"product_id":8051038847085,"position":1,"created_at":"2026-08-24T21:24:42-07:00","updated_at":"2026-08-27T07:08:19-07:00","alt":"Black Cool-jams NightCool Boxer Shorts for men","width":2048,"height":2048,"src":"\/\/www.cool-jams.com\/cdn\/shop\/files\/nightcool-mens-boxer-shorts-black-front-01.png?v=1787839699","variant_ids":[45047155196013,45047155228781,45047155261549,45047155294317]},"available":true,"name":"Men's NightCool Boxer Shorts - Black \/ L","public_title":"Black \/ L","options":["Black","L"],"price":7000,"weight":0,"compare_at_price":null,"inventory_management":"shopify","barcode":"8698043952100006","featured_media":{"alt":"Black Cool-jams NightCool Boxer Shorts for men","id":29805713981549,"position":1,"preview_image":{"aspect_ratio":1.0,"height":2048,"width":2048,"src":"\/\/www.cool-jams.com\/cdn\/shop\/files\/nightcool-mens-boxer-shorts-black-front-01.png?v=1787839699"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":45047155261549,"title":"Black \/ XL","option1":"Black","option2":"XL","option3":null,"sku":"8698043952100007","requires_shipping":true,"taxable":true,"featured_image":{"id":39250378719341,"product_id":8051038847085,"position":1,"created_at":"2026-08-24T21:24:42-07:00","updated_at":"2026-08-27T07:08:19-07:00","alt":"Black Cool-jams NightCool Boxer Shorts for men","width":2048,"height":2048,"src":"\/\/www.cool-jams.com\/cdn\/shop\/files\/nightcool-mens-boxer-shorts-black-front-01.png?v=1787839699","variant_ids":[45047155196013,45047155228781,45047155261549,45047155294317]},"available":true,"name":"Men's NightCool Boxer Shorts - Black \/ XL","public_title":"Black \/ XL","options":["Black","XL"],"price":7000,"weight":0,"compare_at_price":null,"inventory_management":"shopify","barcode":"8698043952100007","featured_media":{"alt":"Black Cool-jams NightCool Boxer Shorts for men","id":29805713981549,"position":1,"preview_image":{"aspect_ratio":1.0,"height":2048,"width":2048,"src":"\/\/www.cool-jams.com\/cdn\/shop\/files\/nightcool-mens-boxer-shorts-black-front-01.png?v=1787839699"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":45047155294317,"title":"Black \/ XXL","option1":"Black","option2":"XXL","option3":null,"sku":"8698043952100008","requires_shipping":true,"taxable":true,"featured_image":{"id":39250378719341,"product_id":8051038847085,"position":1,"created_at":"2026-08-24T21:24:42-07:00","updated_at":"2026-08-27T07:08:19-07:00","alt":"Black Cool-jams NightCool Boxer Shorts for men","width":2048,"height":2048,"src":"\/\/www.cool-jams.com\/cdn\/shop\/files\/nightcool-mens-boxer-shorts-black-front-01.png?v=1787839699","variant_ids":[45047155196013,45047155228781,45047155261549,45047155294317]},"available":true,"name":"Men's NightCool Boxer Shorts - Black \/ XXL","public_title":"Black \/ XXL","options":["Black","XXL"],"price":7000,"weight":0,"compare_at_price":null,"inventory_management":"shopify","barcode":"8698043952100008","featured_media":{"alt":"Black Cool-jams NightCool Boxer Shorts for men","id":29805713981549,"position":1,"preview_image":{"aspect_ratio":1.0,"height":2048,"width":2048,"src":"\/\/www.cool-jams.com\/cdn\/shop\/files\/nightcool-mens-boxer-shorts-black-front-01.png?v=1787839699"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}]

{"id":45047155327085,"title":"Navy \/ M","option1":"Navy","option2":"M","option3":null,"sku":"8698043952100105","requires_shipping":true,"taxable":true,"featured_image":{"id":39250491965549,"product_id":8051038847085,"position":4,"created_at":"2026-08-24T21:54:26-07:00","updated_at":"2026-08-27T07:08:28-07:00","alt":"Navy Cool-jams NightCool Boxer Shorts for men, temperature-regulating sleep fabric","width":2048,"height":2048,"src":"\/\/www.cool-jams.com\/cdn\/shop\/files\/nightcool-mens-boxer-shorts-navy-front-01.png?v=1787839708","variant_ids":[45047155327085,45047155359853,45047155392621,45047155425389]},"available":true,"name":"Men's NightCool Boxer Shorts - Navy \/ M","public_title":"Navy \/ M","options":["Navy","M"],"price":7000,"weight":0,"compare_at_price":null,"inventory_management":"shopify","barcode":"8698043952100105","featured_media":{"alt":"Navy Cool-jams NightCool Boxer Shorts for men, temperature-regulating sleep fabric","id":29805821165677,"position":4,"preview_image":{"aspect_ratio":1.0,"height":2048,"width":2048,"src":"\/\/www.cool-jams.com\/cdn\/shop\/files\/nightcool-mens-boxer-shorts-navy-front-01.png?v=1787839708"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}

Customer Reviews

4.8

Rated 4.8 out of 5 stars

Based on 75 reviews

Write a Review (Opens in a new window)

75 reviews

Sort

JW
Janet W.
Verified Buyer
2 years ago
Reviewing
Men's Moisture Wicking Boxer Separate
Rated 5 out of 5 stars
Cool-jams men’s sleep shorts
I bought these Cool-jams men’s black sleep shorts for my son-in-law for Christmas this year. He absolutely loves them! He likes how soft and comfortable they are. They don’t ride up and are a nice thin material that keeps him cool when sleeping. Being light-weight they pack easily and don’t take up much room in his bag when he travels. It was the best personal gift I could buy for him. Thank you Cool-jams for making such a wonderful product! I would know because I love my Cool-jams nightgown and matching robe that I bought a few years ago and highly recommend, too!
Was this helpful?
MK
Mary K.
Verified Buyer
2 years ago
Reviewing
Men's Moisture Wicking Boxer Pajama Set
Rated 4 out of 5 stars
Colors didn’t match.
Ordered the cool jams men boxer set. Ordered as set, boxer & shirt were in separate packaging and the navy colors were not the same shade of navy.. Also ordered the gray color for my son and the gray colors match.
Was this helpful?
CB
Craig B.
Verified Buyer
2 years ago
Reviewing
Men's Moisture Wicking Boxer Pajama Set
Rated 5 out of 5 stars
PJ pair
Comfortable and keeps me cool
Was this helpful?

Back to NightCool Best Sellers