Keep your bed clean and fresh without chemical worries.  3-layer system consists of 100% GOTS certified organic cotton top and bottom with ultra-thin waterproof layer in the center.  Flexible stretch knit fabric is soft and quiet so you will not even know it's there.  Completely blocks all liquid while allowing water vapor to pass through, reducing sweat and humidity for a more comfortable sleep. 30 Day Money Back | 1 YEAR WARRANTY | FREE RETURNS