18.5" x 16.5" Extra Large Memory Foam Cushion

Extra large size (18.5*16.5*4 Inches) provides unmatched comfort during long sitting Scientifically designed zones like sit bone contours, sculpted leg channels and pressure relief cutout Made of pure memory foam, soft, firm and support, ergonomic shaped hollow design Removable and machine-washable cover with non-slip rubber bottom and retaining strap Versatile use for office, driving, wheelchair or else