the Product: 1. [Ergonomic Design] Perfect office chair cushion, 100% memory foam cushion helps relieve the pressure while driving or sitting for long periods. The ergonomically designed "u"shaped cutout keeps your coccyx suspended above hard seat surface, relieving pressure all along the back, tailbone and legs. It also helps promote healthy posture. 2. [Premium Material] Different from other brands"'" seat cushions that are too hard or lack of support, we put in more costs to increase the density of memory foam, which makes the cushion soft and supportive! When you sit on the cushion you would feel bouncy and comfortable just like sitting on a balloon. 3. [Thoughtful Designs] Removable soft and skin-friendly cover, non-slip bottom. The extended hidden zipper makes it easier to remove the cover, aesthetic and helps avoid your chair being scratched by the exposed zipper. 4. [Wide Applications] Lightweight and durable car seat cushion, which is portable and applicable to various occasions, such as office chair, car seat, home chair, airplane seat, wheel chair and so on. It"'"s also a perfect gift for health! Best Seat Cushion - If you spend +8 hours a day in a seated position, this comfortable pad is just right for you. It provides additional support you need to maintain good posture and the natural curve of the spine. By evenly distributing weight of the body, it offloading pressure on the spinal discs. The ergonomic design helps to increase blood flow, prevents pain in the lower back, helps with muscle fatigue, leg tightness, hamstring. It allows you to sit upright naturally without pain. Premium Memory Foam 100% Premium High Density Memory Foam Soft And Supportive, Bouncy Effect Like Sitting On A Balloon Specifications: Brand: EGASSAM Size: 45*35*7cm Type 1: Breathable Mesh Cover Type 2: Velour Cover Package includes: 1Pcs * Memory Foam Seat Cushions