Sleepsia Memory Foam Square Seat Cushion is designed to provide relief from pressure caused to your lower back. The seat cushion helps in minimising the pressure on the pelvic bone, giving relief from persistent stress & support to the tailbone. This Seat Pad can be used while sitting in the office for a long period & also in your car for comfort. The Outer Cover is made of Mesh Fabric, a flexible, net-like fabric. Dimensions : (L x W x H) : 18 x 18 x 3 Inch