Cushions and supports the lower back and spine reducing strain and fatigue. Upper edges are softly curved to reduce pressure points by gradually tapering away from the user. Unique center channel prevents pressure points on the spine. Contoured Therasoft material retains its shape and provides maximum support. Non-abrasive, anti-static and washable. Elastic strap adjusts to fit any chair. Material(s): Polyurethane foam Assembly Required: No Color: Black Finished Product Dimensions: 14""w x 2 1/2""d x 11""h Finished Product Weight: 1.5 lbs. .