The high resilient foam provides a comfortable upper surface with a central insert for posture support. Provides bony prominences protection at the base of the spine with integral safeguard foam inserts. The cushion has a removable cotton cover with a zip opening. Designed for use in a wheelchair or in a chair, by users in the low/medium risk category. Size 420 x 420 x 75mm (16.5 x 16.5 x 3"). Weight 2kg. Maximum user weight 75kg (11.75 stone).