The Position Pillow series feature a Dri-Tec fabric which manages both moisture and heat. Stomach sleepers are soft and conforming,moving with you to fill facial contours. Back sleepers are a perfect combination of flexible and firm. Gradulated fibers cradle your skull base and self level to reduce neck strain. Side sleepers recharge with high-profile pressure relief.Recovery fibers maintain performance and eliminate neck compression. These pillows act as "A Bed for Your Head" and will help you sleep dryer, cooler and better.