Kantek Deluxe Back Support, 15-1/2w x 3d x 11h, Black (LS400) Ergonomic design provides complete support for back and spine Unique Polyurethane foam retains its shape and rebounds at pressure points for comfort Adjustable straps hold cushion firmly attached to chair Removable cover for easy cleaning Be more comfortable at work Complete support for back and spine. Unique polyurethane sponge material retains its shape and rebounds at pressure points for full support. Removable cover for easy cleaning. Adjustable straps hold cushion firmly to chair. 15-1/2w x 3d x 11h.