Orthopedic Coccyx Cushion - Comfort Firm - 17" x 14" x 3" to - Relax your Tush! Exclusive from DuraCare by Unique Imports. The Best Firm Seat Cushion Support Reduces pressure on the spine and coccyx to ease back pain Made of 2 kinds of molded, highly-resilient foam. Size 17" x 14" Ideal for travel, home or office use or just about anywhere Includes removable and washable cover. top layer is a durable pu leather which is easily cleanable