Woman wearing the Cool-jams NightCool U-Neck Slip Nightgown in Black, front view
Woman wearing the Cool-jams NightCool U-Neck Slip Nightgown in Black
Woman wearing the Cool-jams NightCool U-Neck Slip Nightgown in Black, back view
Woman wearing the Cool-jams NightCool U-Neck Slip Nightgown in Navy, front view
Woman wearing the Cool-jams NightCool U-Neck Slip Nightgown in Navy, side view
Woman wearing the Cool-jams NightCool U-Neck Slip Nightgown in Navy, back view
Woman wearing the Cool-jams NightCool U-Neck Slip Nightgown in Dusk Blue, front view
Woman wearing the Cool-jams NightCool U-Neck Slip Nightgown in Dusk Blue, front view
Woman wearing the Cool-jams NightCool U-Neck Slip Nightgown in Dusk Blue, front view
Woman wearing the Cool-jams NightCool U-Neck Slip Nightgown in Dusk Blue under the Unisex NightCool Robe in Black
Woman wearing the Cool-jams NightCool U-Neck Slip Nightgown in Dusk Blue under the Unisex NightCool Robe in Black
Woman wearing the Cool-jams NightCool U-Neck Slip Nightgown in Black, front view
Woman wearing the Cool-jams NightCool U-Neck Slip Nightgown in Black
Woman wearing the Cool-jams NightCool U-Neck Slip Nightgown in Black, back view
Woman wearing the Cool-jams NightCool U-Neck Slip Nightgown in Navy, front view
Woman wearing the Cool-jams NightCool U-Neck Slip Nightgown in Navy, side view
Woman wearing the Cool-jams NightCool U-Neck Slip Nightgown in Navy, back view
Woman wearing the Cool-jams NightCool U-Neck Slip Nightgown in Dusk Blue, front view
Woman wearing the Cool-jams NightCool U-Neck Slip Nightgown in Dusk Blue, front view
Woman wearing the Cool-jams NightCool U-Neck Slip Nightgown in Dusk Blue, front view
Woman wearing the Cool-jams NightCool U-Neck Slip Nightgown in Dusk Blue under the Unisex NightCool Robe in Black
Woman wearing the Cool-jams NightCool U-Neck Slip Nightgown in Dusk Blue under the Unisex NightCool Robe in Black

Women's NightCool U-Neck Slip Nightgown

$80

$0.22 a night

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  • Stay cool all night
  • Wicks sweat away
  • Dries fast
Color
Size
  • Low stock - 5 items left
  • Backordered, shipping soon

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

Too warm to fall back asleep? This U-neck slip nightgown pulls sweat off your skin and dries fast. Great for hot flashes, menopause night sweats, travel, warm nights or slow mornings at home. Sleep cooler, and rest easy with our 30-Night Trial.

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 rounded U-neck, thin straps and a midi skirt. Nothing extra.

Wear it for

  • Hot nights. Thin straps and a low, rounded neckline let the heat out.
  • Night sweats and hot flashes. The fabric wicks and dries fast from neckline to hem.
  • Cooler mornings, under a robe or a cardigan.
  • Travel, when you want one easy piece.

Why it feels good

  • A rounded U-neck at the front and a scooped back.
  • Thin straps.
  • An A-line skirt with room to move.
  • Soft, cotton-like and smooth against the skin.
  • Bact-Out keeps it fresher between washes.

Good to know

  • Three colours: Black, Navy and Dusk Blue. Sizes S to 3XL.
  • Rounded U-neck, scooped back, thin straps, midi length, no pockets.
  • Machine wash cold or warm on a gentle cycle, tumble dry low or hang to dry. No bleach, and skip fabric softener and dryer sheets: they coat the microfibres and can reduce wicking.
  • Made in Thailand by the same factory partner Cool-jams has worked with since the beginning.
  • Sleep in it for 30 nights. Not right? Send it back for store credit or a refund.

Wake up cool and dry. The Cool-jams Women's NightCool U-Neck Slip Nightgown is a cooling slip nightgown built for hot sleepers and for nights when you run warm. This moisture-wicking slip 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 U-Neck Slip Nightgown

The Cool-jams NightCool U-Neck Slip Nightgown is the simplest slip in the range: a rounded U-neck, thin straps and a midi-length A-line skirt. It is made for menopausal night sweats and for anyone who sleeps warm. The breathable Kottinu knit wicks perspiration off the skin and dries fast, and an odor-control finish helps the fabric stay fresher between washes. In Black, Navy and Dusk Blue, in sizes S to 3X.

How is this different from the V-neck slip?

The U-neck has a rounded neckline and no pockets. The V-neck slip has a pointed V and two side pockets.

How long is it?

It is a midi length. Body length runs from about 33.5 inches in S to 36.75 inches in 3XL, measured flat.

Does it have a built-in bra?

No, this style has no built-in support.

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.

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 measurementSMLXLXXLXXXL
Bust30–3333.5–3636.5–3939.5–4242.5–4545.5–51
Upper arm11–1212.5–1313.5–1414.5–1515.5–1616.5–17
US dress size4-68-1012-1416-1820-2224-26
UK / AU8-1012-1416-1820-2224-2628-30
EU34-3638-4042-4446-4850-5254-56

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

Woman sitting on the bed with a mug in a navy Women's NightCool Scoop Neck Nightshirt, morning sun on a wood wall, the 30-Night Cool Sleep Trial

30 nights to fall in love with it

Sleep in it. Wash it. Relax and enjoy it for 30 nights. Not right for you? Send it back for store credit or a refund.

See trial terms
  • Dries in minutes
  • Regulates temperature
  • Odour control
  • Soft, pill-resistant

The 3 AM test: cotton or NightCool?

Same sweat. Different night.

NightCoolCotton
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

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