Skil-Care Fluid-Proof Cover Anti-Thrust Seat Cushion provides a comfortable slide-control alternative to pommel cushions. The anti-thrust barrier eliminates forward and sacral sitting problems. It helps to maintain pelvic neutrality. It has high-density foam increases comfort and relieves pressure. It has contoured base eliminates sling-seat ham mocking and minimizes seat rise. It has fluid-proof Low-Shear II cover prevents skin-damaging friction –wipes clean. It has water-based gel pod provides pressure relief in the coccyx area. It has safety strap secures cushion to wheelchair. It has soft base model.