Dreamsweet Memory Foam Tailbone Seat Cushion Pad for Driving, Office, Home Sitting Comfort, Gray User-removable tailbone piece, avoiding tailbone contact and pain Wedge design - Slanted from 2 " at the back to 1" at the front Creating slight forward tilt, improving seating posture; Keeps hips at comfortable seating angle High-Density memory foam ensures ample and cushy comfort for the lower end Comes with breathable, removable and washable 100% cotton covers