LoveHome Coccyx Orthopedic Comfort Memory Foam Seat Cushion-H Shape seat Cushion (Black) Special H shape design reduces pressure on the coccyx, tailbone and hip bones while driving/sitting Patented design promotes healthy weight distribution, posture and spine alignment Assists in the relief and treatment of lower back pain, numbness, and pressure sores Elastic strap on bottom of coccyx cushion could fix the cushion around any office chair so it doesn't move around. The Lovehome coccyx cushion can be folded into half its size and packed into a portable bag (package included). Removable velvet cover is machine washable and allows for easy cleaning