One Price. Every Size.
NASA-engineered bedding absorbs excess heat and releases it as you cool—so your bed stays comfortable all night.
Shop the SaleSale ends soon!
One price in every size — the bigger your bed, the more you save.
Shop the SaleOur Best Sellers
The best place to start your bedding upgrade.
This Month's Top Movers
The three pieces flying out of the warehouse this October.
Top mover · PillowsThe pillow hot sleepers swear by
Outlast® fabric on both sides pulls heat away from your head and neck all night. Every pillow is just $40 this October.
Shop all in the saleTop mover · SheetsSilky TENCEL™ sheets that sleep cool
Our best-selling sheet set wove Outlast® directly into silky TENCEL™. Absorbs heat when you run hot, releases it as you cool. All sets $125.
Shop all in the sale
Top mover · AvecRelaxed linen, lived-in comfort
Avec is our sister line of linen-blend bedding — breathable, effortless and made to be slept in. Sets from $50 in the sale.
Shop all in the saleEvery Pillow
All $40
Save up to $80Every Sheet Set
All $125
Save up to $224
The technology
Born for space. Built for great sleep.
Outlast® material was originally developed for NASA spacesuits to protect astronauts from wild temperature swings in orbit. We wove the same phase-change technology into every sheet, comforter, pillow and pad we make.
Absorb
Microcapsules soak up excess body heat the moment you run hot — before it turns into sweat.
Store
That heat is stored inside the fabric, holding your microclimate at the ideal sleep temperature.
Release
As you cool down, the stored warmth flows back out — no chills, no 3am blanket juggling.
- Clinically shown to reduce night sweats by up to 50%*
- Improves sleep efficiency by 20% — more time in deep sleep*
- The only bedding brand certified with Outlast® space technology
- Designed & shipped from Denver, Colorado
*Outlast Humidity & Heat Sleep Studies
How It WorksReal Simple
“For truly hot sleepers, leave it to NASA engineering to figure out a way to help you finally stay cool at night.”
Hot Deals
Cooling Upgrades
Under $50
Pillowcases, covers, throws and loungewear from $15.
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Why Slumber Cloud
Free US Ground Shipping
Orders ship free, typically within 24 business hours from our Denver warehouse.
30 Night Risk Free Trial
Sleep on it, wash it, put it to the test. Don't love it? Full refund, no questions asked.
Sale Price Match
If it goes on a deeper sale within 30 days, we'll refund the difference.
Award Winning Sleep
Clinically shown to reduce sweat by 50% and improve sleep by 20%.