The Original ProStretch Double allows you to vary stretching levels, exercises and time spent by exercising both feet simultaneously. The Original ProStretch's stretching system has been proven to stretch lower leg muscles easier and far more effectively than conventional methods. This improved flexibility and range of motion helps relieve, rehab and alleviate plantar fasciitis, shin splints, tight calves, and Achilles tendonitis as well as enhance overall performance. ProStretch provides relief for: Heel Pain & Plantar Fasciitis, Shin Splints, Achilles tendonitis, Strained Calf, Ankle weakness, Fallen Arches, Inflexibility.