Designed for both comfort and function, Nylex-covered gel/foam wheelchair cushions utilize a gel pack placed between two layers of resilient foam to stabilize wheelchair patients while reducing pressure. Available in four sizes: 16" x 16" x 3" (41 x 41 x 8 cm), 18" x 16" x 3" (46 x 41 x 8 cm), 18" x 18" x 3" (46 x 46 x 8 cm) and 20" x 16" x 3" (51 x 41 x 8 cm).