The Heel Seat (looks like a shoe pad) is made from KRATON, specially researched and formulated to meet stringent anatomical specifications. These are washable and extremely durable for long-term use. They flex as you walk or run, providing just the right amount of relief as your weight shifts without interfering with the fit of the shoe. The Heel Seats can be worn in most any type of shoe, and the special material they are made from keeps them in place at all times.