Product Material: gel + memory foam + flannel Size: 45 * 35 * 7 cm Color: gray, royal blue, black Quantity: 1 piece Package content: 1 piece * Gel cushion 1.Help alleviate sciatica and lower back painGel cushion has been ergonomically designed to help take pressure off of the users lower back or tailbone and offers orthopedic tailbone pain relief while sitting. This gel cushion promotes healthy posture and proper spinal alignment. 2.Ergonomically shaped with pressure-relieving cut outThe U-shaped design, with its cut-out center and contoured surface, removes pressure from the coccyx to ensure the tailbone hovers over the surface of the seat, thereby alleviating any discomfort caused by sitting for extended periods. 3.Cooling gel memory foam seat cushionThis gel cushion is made from high-quality memory foam to offer comfort and to help relieve back pain, tailbone pain, and sciatica. Layered over the memory foam is a padding of cooling gel meant to keep users cool and comfortable throughout the day. This cushion is ideal for office chairs, wheelchairs, airplanes, or for use in a car. Great for short and long trips. 4.Includes washable cover, anti skid bottom This cushions cover is removable mesh that is completely machine washable to make cleaning easier. The cushion also features a non-slip, rubber bottom to ensure the cushion will stay firmly positioned in a seat . 5.Wide applicationEach gel cushion measures 45 * 35 * 7 cm and is great for any car seat, wheelchair, office chair or computer chair, family chair or seat of public transportation.