Brookstone Climasure Performance Mattress Pad, King, White

With 37.5 technology, patented active particles permanently embedded at the fiber level capture and release moisture vapor. Not only do these active particles provide 800% more surface area to the fiber, they also provide a unique driving force to remove moisture vapor unlike any other technology. by actively responding to body heat, the active particles use this energy from the body to accelerate the vapor movement and speed up the conversion of Liquid to vapor, significantly increasing drying rates. This means the hotter the user gets, the stronger the driving force removing moisture becomes-and the more comfortable the mattress pad remains.