Flash Sale! Pijio Coccyx Orthopedic Comfort Gel Memory Foam Seat Cushion - Water Proof Cove Included Free - Relieves Sciatica, Back Pain, Tailbones, Spine, Hips (Charcoal Gray) Black Friday - This week only! Don't miss out on this amazing price and value, limited holiday supply. Seat Cushion Specifications: Free Waterproof Cover (19.95 value). Core is high density memory foam with gel insert. Plush cover for inside use. 17.5 x 14 x 3 inches. 1.4 lbs. BEST COMFORT in an office chair, travel, car seat, plane, wheelchair, scooter, stadium seating, desk. PORTABLE AND EXTRA CUSHIONING for use at computer, hard wooden surface, sofa, recliner, or bleacher bench. RELIEVES spinal pressure, numbness, sciatic nerve damage, hemorrhoid, herniated disc, and more.