Woman wearing the Cool-jams NightCool Sleep Mask in Navy

Woman wearing the Cool-jams NightCool Sleep Mask in Navy, front view

Woman wearing the Cool-jams NightCool Sleep Mask in Navy, relaxing at home

Woman wearing the Cool-jams NightCool Sleep Mask in Black

Woman wearing the Cool-jams NightCool Sleep Mask in Dusk Blue with the NightCool Cowl Neck Nightgown in Dusk Blue

Woman wearing the Cool-jams NightCool Sleep Mask in Navy with the NightCool Cowl Neck Nightgown in Navy

Three women wearing the Cool-jams NightCool Sleep Mask in Black, Navy and Dusk Blue with the NightCool Cowl Neck Nightgown

Woman wearing the Cool-jams NightCool Sleep Mask in Black, front view

$24

$0.07 a night

Stay cool all night
Wicks sweat away
Dries fast

Size chart

Women's Sizing

Woman standing in her bedroom in the NightCool Long Sleeve T-Shirt and Pants in Navy, showing a relaxed fit — Shown: the NightCool Long Sleeve T-Shirt and Pants in Navy, a relaxed fit.

Review the suggested size chart for your body measurements. If you fall between two sizes, we suggest going up because sleepwear is always more comfortable if the fit is looser.

	S	M	L	XL	XXL	XXXL
Your Dress Size	4-6	8-10	12-14	16-18	20-22	24-26
Your Bust	34-36 in.	37-39 in.	40-42 in.	43-45 in.	46-49 in.	50-53 in.
Your Hips	35-37 in.	38-40 in.	41-43 in.	44-46 in.	47-50 in.	51-54 in.

For specific measurements, please open the size guide on each product page: every style has its own chart, measured on the garment laid flat.

How to measure: lay a garment that fits you flat and measure point to point in inches across chest, sleeve, body length, waist, hips and inside length

If you require specific garment measurements, please contact us for additional information.

Men's Sizing

Men's NightCool comes in M, L, XL and XXL. Each men's product page has its own size guide, measured on the garment laid flat. Browse Men's NightCool Sleepwear.

Color: Black

Black

Navy

Dusk Blue

In stock, ready to ship
Backordered, shipping soon

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

A soft sleep mask in our Kottinu fabric, the same one that keeps NightCool sleepwear dry. Made for early sunrises, naps and travel, and an easy add-on gift next to a NightCool nightgown or robe.

What is Kottinu?

Kottinu, our proprietary performance fabric 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.

A soft sleep mask in the same Kottinu fabric as your NightCool sleepwear.

Wear it for

Early sunrises and late nights.
Naps and travel.
Gifting, next to a NightCool nightgown or robe.

Why it feels good

Kottinu wicks moisture and dries fast.
A contoured shape with neatly bound edges.
Three colours to match your NightCool pieces.

Good to know

Three colours: Black, Navy and Dusk Blue. One size.

The Cool-jams NightCool Sleep Mask is made from our proprietary Kottinu fabric, the same fabric as our NightCool sleepwear, in colours that match your NightCool pieces.

More about the Sleep Mask

The Cool-jams NightCool Sleep Mask is made from Kottinu, the same fabric as our NightCool sleepwear, which wicks moisture and dries fast. It has a contoured shape and neatly bound edges, and comes in Black, Navy and Dusk Blue to match your NightCool pieces. One size.

What is it made from?

Kottinu, the same moisture-wicking fabric as our NightCool sleepwear.

What size is it?

One size.

Does it match my NightCool sleepwear?

Yes. It comes in Black, Navy and Dusk Blue, the same colours as the new NightCool nightgowns and cami.

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.

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The 3 AM test: cotton or NightCool?

Same sweat. Different night.

	NightCool	Cotton
Sweat on your skin	Pulled off you. Dry fast.	Soaks in and stays.
Odor	Bact-Out finish, so the fabric stays fresher	Nothing in it to help
After the wash	Holds its shape, no pilling	Pills with wear
By 3 AM	Dry	Damp

Try it for 30 nights. Not cooler? Send it back. How the trial works

NightCool Sleep Mask