The wrap for back pain relief. The secret is the calf wrap for help with back pain relief. Helps relieve lower back pain associated with lower back pain and sciatica. One size fits all. Adjustable. Unisex. Works on left or right leg. Wear over or under clothing. 80% neoprene and 20% Polyester. Imported. Hand wash. These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure or prevent any disease or medical condition. Individual results may vary. Not a medical device. Please consult your physician before using this or any other product that is designed to help relieve a symptoms or condition.