Sacro-Ease Ergo Wedge Seat Support Cushion. The McCartys Sacro-Ease Ergo Wedge is a new product designed to give superior back support. Made with poly foam and comfort foam, the Ergo Wedge helps bring your hips and knees to a neutral position reducing the impact to the spinal discs. There is a removable insert in the tailbone area should you need it. The fabric is removable and washable. Complete with internal comfort memory foam, this support will provide maximum comfort while supporting your spine. The Ergo Wedge can give an old seat new life by adding a supportive, ergonomic wedge to realign your body. Those who need extra support every day at work such as taxi drivers, bus drivers, pilots, and truck drivers have used Sacro-Ease products for years. The Ergo Wedge can reduce muscle tension and stress related to sitting in unsupportive chairs and seats! Features: Wedge-shaped to level out your seat, bringing your hips and knees to a neutral position, reducing the impact to the spinal discs Made with poly foam and comfort memory foam for maximum comfort Removable insert in the tailbone area Fabric is washable and soft to the touch. Proven to be excellent for autos, airplanes, bus seats, chairs and sofas Durable non-skid bottom Dimensions: 16" L x 15" W x 3" H Weight: 3 lbs.