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. Unique shape supports and aligns. Memory foam softens with body heat, molds to back. Set the most comfortable position with SmartFit™ system. Memory Foam content, 50% recycled. Back Support Type: Chair; Material(s): High-Density Memory Cell Pressure-Sensitive Foam; Width: 16 5/8 in; Depth: 2 7/8 in.