Office Chair Back Support Temperature and pressure-sensitive foam molds to your bodys contours, proving great lower back support Removable and washable fabric cover stays cleaner longer High-density memory cell foam was originally developed by NASA to relieve G-force strain during lift off. Temperature- and pressure-sensitive, it molds to the body¿s contour, offering optimal comfort and back support. Provides maximum back support. Two adjustable straps hold cushion in place.