If back pain makes turning in a car seat or chair a torturous ordeal, help is here. This transfer cushion takes the pressure and strain off your back and hips when turning. It has a soft 1" (25mm) foam padded seat which supports up to 136kg (21 stone). It rotates 360°, is lightweight and comes with a carry strap. Diameter: Base 380mm. Cushion: 355mm