NASA Cooling Tech Transforms Bedding: Slumber Cloud's Sheets Reviewed

Slumber Cloud's performance sheets use NASA-developed technology to regulate temperature and improve sleep.

Published on Mar. 1, 2026

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I've tested a lot of bedding, but nothing compares to the cooling and comfort of the Slumber Cloud Performance Cotton Sheet Set. These sheets use NASA-developed phase change materials to actively absorb and release heat, keeping me cool and comfortable all night long. The breathable cotton blend feels substantial yet airy, and the sheets have held up beautifully through repeated washings. While an investment, Slumber Cloud's bedding is worth it for the dramatically improved sleep quality.

Why it matters

Slumber Cloud is bringing NASA-grade temperature regulation technology to the bedroom, offering a real solution for hot sleepers, couples with differing temperature preferences, and anyone seeking a more restful night's sleep. In an era of private equity-owned bedding brands, Slumber Cloud stands out as a mission-driven company focused on using advanced science to solve common sleep problems.

The details

Slumber Cloud's sheets use a blend of 30% Outlast viscose and 70% cotton, with the Outlast technology originally developed by NASA to protect astronauts from extreme heat and cold. Tiny "Thermocules" encapsulate phase change materials that absorb excess heat when you're warm and release it back when you cool down, creating a stable "microclimate" in your bed. This two-way thermal regulation process helps prevent night sweats and keeps you in the ideal "Goldilocks zone" of comfort.

  • Slumber Cloud was founded in the early 2000s to commercialize the NASA-developed Outlast technology for the bedding market.
  • The Slumber Cloud Performance Cotton Sheet Set has been available for purchase since 2022.

The players

Slumber Cloud

A performance bedding company that uses NASA-developed temperature-regulating technology to create cooling sheets, pillows, and other sleep products.

Willy Van Dehy

The CEO of Slumber Cloud, with over 10 years of experience in the bedding industry.

NASA

The United States National Aeronautics and Space Administration, which originally developed the phase change material technology used in Slumber Cloud's products to protect astronauts from extreme temperatures in space.

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What they’re saying

“Our mission is to use advanced technology to fix the 'microclimate' of your bed, or the space between your mattress and top covers where you sleep at night.”

— Willy Van Dehy, CEO of Slumber Cloud (Post Wanted)

“When you buy Slumber Cloud, you are investing in a thermal regulator. If you get 20% more deep sleep, the cost is only about 10 cents a night over 5 years. It's an investment in your health and your energy for the next day.”

— Willy Van Dehy, CEO of Slumber Cloud (Post Wanted)

What’s next

Slumber Cloud plans to continue expanding its line of performance bedding products that utilize the NASA-developed Outlast technology to improve sleep quality.

The takeaway

Slumber Cloud's sheets represent a breakthrough in bedding technology, using NASA-inspired science to actively regulate temperature and create a more comfortable, restful sleep environment. For hot sleepers or anyone seeking better quality sleep, Slumber Cloud's sheets are a worthwhile investment that can pay dividends in improved health and energy.