This premium gel cushion combines "Trugel" and "Flogel" for enhanced immersion and superior body alignment and weight distribution. The anatomically shaped base is contoured with pommel channels to support femurs and promote good posture. Visco elastic and quick-recovery foams bounce back to prevent bottoming out. Features: Suitable for medium to high risk users Lightweight – only 4.6 lbs – easy to use & transport Waterproof & washable cover – suitable for incontinent users Stretchy & breathable cover – reduces skin shear and friction Top & Back labels – insure correct positioning and use of cushion Specifications: Weight: 4.6 lbs. Sizes: 16"W x 16"D x 4"H   16"W x 18"D x 4"H   18"W x 16"D x 4"H   18"W x 18"D x 4"H   14"W x 14"D x 4"H   15"W x 15"D x 4"H