Manufactured with a 1" (2.5cm) EthaFoam base to provide a more stable seating platform and to correct sagging sling seats on wheelchairs. The polyurethane foam wedges are 3" (7.5cm) high at the front tapered to 1" (2.5cm) at the back. All come with a handy carry handle. Available with a black Lacosta knit cover. 16"x16"x4" (40.6x40.6x10.2cm)