Best used with 3EE - 6EE size shoes. Recommended footwear: Ski and snowboard boots running and trail running shoes hiking boots work boots and walking shoes- all with removable insoles. Provides maximum support stability and shock absorption and is ideal for feet with medium to high arches. Extra deep cup cradles your heel' s fat pad for natural shock absorption while the biomechanically correct arch shape provides comfortable support. Friction control top cover with AgION antimicrobial treatment helps reduce odor-causing bacteria. Durable lightweight 3⁄4 external polypropylene stabilizer cap provides optimum rear foot control and flexibility. Supports and aligns the bones of the foot helping prevent heel pain Plantar Fasciitis and other common foot problems. Each pair includes a User' s Guide with information on sizing and trimming your new insoles and the package is recyclable.