The Sof•Care® Chair Cushion features 3-layer air-channeling technology. This advanced technology harnesses the unique support that air can provide and properly allocates it to manage pressure redistribution. It combines three layers of interlocking air cells to create a comfortably contoured support surface. The Sof•Care® Chair Cushion elevates the body's sensitive pressure points off the surface of the chair and redistributes the patient´s weight over the surface of the cushion. The result is a superior combination of support and comfort to prevent pressure ulcers. Additional features include: Lightweight, waterproof and easy to clean. Reduces tissue interface pressure to prevent and treat pressure ulcers. Pre-inflated, ready-to-use requiring no caregiver training. Low-profile design fits all chairs. Size 18"W x 19-5/8"L deflated (46cm x 50cm).