Low-Profile Antithrust CushionsAliMed Low Profile Antithrust Cushion features a convex Solid Seat Insert base, which nestles into a sling seat wheelchair to ensure level seating with minimal seat rise. Because the cushion is just 6"H at the front edge, it's much easier to assist patient transfer. Provides the antithrust protection needed when extensor tone is present. Effective alternative to pommel cushions for those who find pommels uncomfortable. Covered in AliTex, a Gore Tex