Pijio Flash Sale Coccyx Orthopedic Comfort Memory Foam Seat Cushion - Water Proof Cover Included Free - Relieves Sciatica, Back Pain, Tailbones, Spine, Hips (Navy Blue) Black Friday - This week only! Don't miss out on this amazing price and value, limited holiday supply. SPECIFICATIONS: Core is high density memory foam. Plush cover for inside use. 17.5 x 14 x 3 inches. 1.4 lbs. Waterproof cover included free ($9.95 value) RELIEVES spinal pressure, numbness, sciatic nerve damage, hemorrhoid, herniated disc, and more. BEST COMFORT in an office chair, dining, kitchen, travel, car (driver or passenger), plane, wheelchair, scooter, desk. PORTABLE AND EXTRA CUSHIONING for use at computer, hard wooden surface, sofa, recliner.