The Spenco RX Plantar Fascia is your prescription to move about the day. Built with a sturdy nylon arch support that comfortably stretches the plantar fascia for every day comfort. The engineered arch bridge supports plantar fascia so that the arch does not collapse allowing the user to stand and move in a neutral position. Seizing the day never felt so good. Activity: Everyday, Walking, Running, Cross Training, Hiking, and Prolonged Standing Arch Type: Medium Condition: Foot & Leg Pain, Back & Knee Pain, Over Pronation, Achilles Tendonitis, Plantar Fasciitis, Arch Pain, Flat Feet, and Heel Pain Shoe Type: Running, Walking, Work, and Boots Warranty: 1-year limited warranty: Spenco offers a 1-year warranty against manufacturer defects. This warranty does not cover damages resulting from accidents, misuse, abuse or lost merchandise. Need proof or purchase for warranty coverage.