An extra wide pressure relief and redistribution cushion that has pronounced contours for controlling sliding and improving body posture. Raised front prevents forward thrust. Maintains pelvic neutrality to control sliding. Leg troughs promote thigh alignment and postural symmetry. Elevated sides improve lateral stability. Visco-elastic foam pad relieves coccyx pressure. High-density foam increases comfort. Low-Shear II wipe-clean cover reduces skin damaging friction. Safety strap secures cushion to the wheelchair.