Skil-Care Seat Cushion 51 X 41 X 10 cm Foam - EachSeat Cushion Skil Care 20 W X 16 L X 4 D Inch Foam Visco elastic foam pad relieves coccyx pressure Low Shear II wipe clean cover reduces skin damaging friction Leg troughs promote thigh alignment and postural symmetry Raised front prevents forward thrust Maintains pelvic neutrality to control sliding A pressure relief and redistribution cushion that has pronounced contours for controlling sliding and improving body posture Safety strap secures cushion