Herbal Naturale SubZero 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. SubZero Cold 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. Itis absorbed through the skin for localized relief of pain, soreness, and inflammation and contains CBD or THC (depending on which product is bought), a superior antioxidant and anti-inflammatory and is highly effective in treating pain and inflammation while being a muscle relaxer.