AliMed® Antithrust Cushion is a restraint-free option for difficult positioning problems. Diminishes problems associated with forward thrust and sacral sitting while maintaining pelvic neutrality. Portion of cushion with lower height is placed at back of wheelchair seat. User's legs drape over higher portion. We recommend this item for men as an alternative to the pommel cushion. 16" D x 18" W x 6"H' front to 3" back. Secures to chair with safety ties. Available with Solid Support base (not convex) to fill wheelchair sling seat for more stable, flat sitting surface. Grey, no-slip cover.