BLUE CHIP ADJUSTABLE SKIN PROTECTION CUSHIONS - Self Adjusting Air Pressure Wheelchair Cushion, 20 x 16" | Quantity - 1x EAThe GRZ helps to reduce interface pressures by dynamically adjusting to body weight and movement. It is a non powered pressure relieving mattress with nine individual dynamic self adjusting air bladders inside a high resiliency foam shell. The nine zones relieve pressure where it is needed most. Supports patient weights up to 1000 lbs. with bariatric models. Self Adjusting Air Pressure Wheelchair Cushion, 20 x 16" Mfr. Direct