Soft & smoothLuxuriously silky soft and stretchy cooling nylon cover fabricUltraCool Comforter
$299.00
1
Free US shipping & 30-night trial
Overview
Introducing the UltraCool Comforter for a cool, comfortable sleep. Featuring cooling nylon/spandex and NASA-engineered fiberfill for year-round comfort. Comes in two-weights: Lightweight for the hottest sleepers and All-Season for those who prefer a little more weight.
Features & Benefits
Soft & smooth
Luxuriously silky soft and stretchy cooling nylon cover fabric
Hypoallergenic
Hypoallergenic, patented ClimaDry™ by Outlast fiberfill provides a down-like feel while regulating heat and moisture as you sleep
Corner loops
Corner loops keep it in place if used as an insert inside a duvet cover
Materials, Fabric Technology & Care
What it is made from
- 155 gsm 89% Cooling Nylon 11% Spandex Jersey outer cover
- 50% Outlast® ClimaDry polyester fiberfill / 50% polyester fiberfill
- 300 gsm fill weight for the All-Season option / 150 gsm for the Lightweight option
- 12" framed quilt boxing
How the fabric works
- Luxuriously silky soft and stretchy cooling nylon cover fabric
- Hypoallergenic, patented ClimaDry™ by Outlast fiberfill provides a down-like feel while regulating heat and moisture as you sleep
- Corner loops keep it in place if used as an insert inside a duvet cover
- OEKO-TEX® STANDARD 100 Certified Technology. Certification Number: SH025 151577 TESTEX
- Two fill weights to choose from: Lightweight for hot sleepers or All-Season for those who want more loft and weight
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 1-3 months. Reduce wrinkles by removing this from the dryer immediately.
Sizing & Dimensions
Twin / Twin XL - 76" x 86" Full / Queen - 90" x 98" King / Cal-King - 108" x 98"
*For Cal-King mattresses simply rotate the comforter 90º
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 cover fabricHypoallergenicHypoallergenic, patented ClimaDry™ by Outlast fiberfill provides a down-like feel while regulating heat and moisture as you sleepCorner loopsCorner loops keep it in place if used as an insert inside a duvet cover
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
- 50% Outlast® ClimaDry polyester fiberfill / 50% polyester fiberfill
- 300 gsm fill weight for the All-Season option / 150 gsm for the Lightweight option
- 12" framed quilt boxing
Technology & benefits
- Luxuriously silky soft and stretchy cooling nylon cover fabric
- Hypoallergenic, patented ClimaDry™ by Outlast fiberfill provides a down-like feel while regulating heat and moisture as you sleep
- Corner loops keep it in place if used as an insert inside a duvet cover
- OEKO-TEX® STANDARD 100 Certified Technology. Certification Number: SH025 151577 TESTEX
- Two fill weights to choose from: Lightweight for hot sleepers or All-Season for those who want more loft and weight
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 1-3 months. 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
Does this need to be paired with a duvet cover?
The premium outer cover is designed to be used on its own, so a duvet cover is optional and is not required for temperature-regulation performance.
I sleep hot, but my partner sleeps cold. Will it work for both of us?
Yes. Outlast® is designed to adjust to each sleeper's temperature by absorbing excess heat when warm and releasing it as the body cools.
Which weight should I choose?
Choose Lightweight if you sleep especially hot or live in a warmer climate. Choose All-Season for more loft and year-round coverage.
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