Subzero Therapy Pain Relief (3.0 oz) is a topical analgesic that uses the cooling effect of menthol, a natural pain reliever, to soothe minor muscle and joint pain. It penetrates quickly, offering relief through cold therapy. For this reason, it’s especially effective for use in conjunction with hands-on health care such as chiropractic, massage and physical therapies, and podiatry. SubZero therapy is used to reduce pain, swelling and nerve activity. It reduces arterial blood flow to the applied area, while increasing circulation in the skin. SubZero is absorbed through the skin for localized relief of pain, soreness, and inflammation.