Running Sports Insoles. TPU Base Ideal for High Impact Sports and Activity. Arch Support for Men & Women. Plantar Fasciitis Relief. Maintains stability and alignment of the foot whilst still allowing it to flex, perfect for running and sports. Strong yet ultra flexible TPU base for effective positioning. Soft shock absorbent material gives ultimate comfort for your feet when they need it most. Designed with an open heel seat which allows the material to compress without the heel pounding on hard surface. Trim to fit your exact size. Use guidelines at the toe or your existing shoe insole as a template.