Soft & smoothLuxuriously silky soft and stretchy cooling nylon fabricSale ends in
Limited-time pricing, every size.
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UltraCool Pillowcase
$25.00$34.00
Limited-time sale price — you save $9 on this size
Standard · White is sold out.
This size is not expected back this sale season — pick an in-stock option below.
1
Free US shipping & 30-night trial
Overview
Introducing the UltraCool Pillowcase for a cool, comfortable sleep. Featuring a silky smooth cooling nylon/spandex fabric for comfort. Simply zip over your existing pillow.
Features & Benefits
Soft & smooth
Luxuriously silky soft and stretchy cooling nylon fabric
Zippered enclosure
Zippered enclosure
Adaptive cooling
Temperature-regulating comfort
Materials, Fabric Technology & Care
What it is made from
- 155 gsm 89% Cooling Nylon 11% Spandex Jersey outer cover
- Zippered enclosure
How the fabric works
- Luxuriously silky soft and stretchy cooling nylon fabric
- Zippered enclosure
How to care for it
Basic Care: Machine wash cold water on a gentle cycle with a mild detergent and with like colors only. Do not use fabric softener. Only use non-chlorine bleach when needed. Tumble dry low heat until completely dry. Remove from dryer immediately. Do not dry clean. Do not iron.
Pro Tip: Wash this every 1-2 weeks. Reduce wrinkles by removing this from the dryer immediately.
Sizing & Dimensions
Standard - 20” x 27” King - 20” x 37”
Shipping, Returns & Price Match
Free US ground shipping — orders typically ship within 24 business hours from Denver, Colorado. Try it for 30 nights; if you don't love it, return it for a full refund. If it goes on a deeper sale within 30 days, we'll refund the difference.
Made for cooler, deeper sleep
Why you'll love it
Soft & smoothLuxuriously silky soft and stretchy cooling nylon fabricZippered enclosureZippered enclosureAdaptive coolingTemperature-regulating comfort
Inside the product
Materials chosen for cooler, more comfortable sleep.
From what touches your skin to how it performs overnight, every detail below comes directly from this product’s materials and care information.
Materials
- 155 gsm 89% Cooling Nylon 11% Spandex Jersey outer cover
- Zippered enclosure
Technology & benefits
- Luxuriously silky soft and stretchy cooling nylon fabric
- Zippered enclosure
Care
Basic Care: Machine wash cold water on a gentle cycle with a mild detergent and with like colors only. Do not use fabric softener. Only use non-chlorine bleach when needed. Tumble dry low heat until completely dry. Remove from dryer immediately. Do not dry clean. Do not iron.
Pro Tip: Wash this every 1-2 weeks. Reduce wrinkles by removing this from the dryer immediately.
What the press says
“For truly hot sleepers, leave it to NASA engineering to figure out a way to help you finally stay cool at night.”
— Real Simple
The only NASA-derived bedding
Outlast® technology, originally developed for NASA
Award-winning sleep
Recognized by sleep and home editors
Independently lab tested
Improves sleep by 20%, reduces sweat by 50%
Verified Yotpo reviews
Real ratings from 30K+ sleepers
Good to know
Frequently asked questions
How does this bedding help with temperature?
Outlast® phase-change material absorbs excess body heat as you warm and releases it back as your temperature drops.
Can I wash it at home?
Yes. Follow the care instructions above for this product and avoid high heat to protect the fabric and temperature-regulating finish.
What if it is not right for me?
Eligible products include free US returns and a 30 night risk-free trial, so you can wash it, sleep on it and put it to the test.
Real sleepers, real results
Customer reviews
+30k verified reviews, powered by Yotpo.
Tested, not just claimed
Independent sleep testing on Outlast® bedding.
50%
reduction in sweat
20%
improvement in sleep
30K+
happy sleepers