Ever-Soft Pommel Gel-Foam CushionsPommel design prevents forward sliding and improves patient posture Constructed from high density gel foam with a unique design to promote proper hip and knee alignment Firm foundation reduces pressure caused by sling seat hammocking Chambered dual gel pod reduces gel migration and dissipates heat Convenient, adjustable strap secures to wheelchair Includes removable, low shear, vapor permeable cover with non skid bottom Weight capacity 300 lb. 18