30 NIGHT TRIAL: Sleep on it. Dream on it. If you don’t love your Nusleep bedding, send it back for a full refund. 


Your body already has the ultimate thermo-regulating system. The perspiration vapor that comes off of skin during sleep cools the body. In fact, each gram of evaporated sweat releases 580 calories of stored heat. Unless this water vapor can be removed from the microclimate, it builds up in bedding and creates aclammy and uncomfortable microclimate.

37.5 Technology works to enhance the body’s natural cooling mechanism—the body puts out sweat to cool it down, 37.5 Technology removes it from the microclimate.

37.5 technology works to keep the optimum relative humidity in your microclimate so your body more efficiently maintains an ideal core temperature, enabling you to perform better, longer. 37.5 is made with natural particles derived from volcanic ash. Because it is naturally derived, there are no harsh chemicals to irritate your skin. These particles are permanently embedded into the yarn and will never wash out or degrade.

37.5 active particles provide 800% more surface area to the fiber. Because of this increased surface area, fabrics made with the technology dry five times faster than similar fabrics. This means that sweat won’t collect and your bedding will need to be washed less frequently. When the bedding is washed, drying times are reduced, saving you money on energy costs. Learn more at www.thirtysevenfive.com

37.5 Technology is trusted by these great consumer brands: