The blocks filled with air are independent and so the body sinks into the cushion, resulting in an increased contact bearing surface. The air circulating between the blocks also helps prevent maceration. The anti-slip base prevents the cushion from sliding forward on the chair. Cover that is permeable to air but impermeable to liquids. Supplied with a hand pump for inflating the cushion. TECHNICAL INFORMATION Cushion weight 1 kg Maximum user weight 120 kg