The Portable Gel Seat Cushion provides a soft, supportive layer between you and any hard seating surface. The portable seat cushion has a memory foam base which spreads your weight evenly while relieving stress in your spine and backside. In addition, this cushion was intelligently designed with a center grove which elevates the tailbone. This eliminates actual surface contact with your tailbone which reduces spine pressure. This product features an ergonomic design that guides your lumbar curva