Manufactured with a 1 in (2.5 cm) EthaFoam base to provide a more stable seating platform and to correct sagging sling seats on wheelchairs. The polyurethane foam wedges are 3 in (7.5 cm) high at the front tapered to 1 in (2.5 cm) at the back. All come with a handy carry handle. Available with a black Lacosta polyknit cover. 16x16x4 in (40.6x40.6x10.2 cm)