The Slant Board is a calf stretching device designed to increase flexibility and reduce tightnessPosition your foot on the Slant Board and shift your own body weight overtop of your foot. This will stretch and improve a tight calf muscle while also strengthening the Achilles tendon.• 3 Adjustable height settings• Increase flexibility & reduce tightness• Available in 2 sizes• Folds for easy storage• Great tool for ankle rehabSlant Board - 11" Slant Board Effective for stretching, performance enhancements, injury prevention and rehabilitation. 3 levels: 26°, 38° and 42°. Targets arch, calf, hamstring and hip. Non-slip top and bottom surfaces.