Lasts up to 6 hours! Biofreeze is a unique, effective analgesic formulated to provide a variety of benefits for therapy, comfort, and pain relief, including sore muscle relief. Biofreeze is frequently used before, during and after exercise/training, and for arthritis joint pain relief. This product is greaseless, stainless, and has a vanishing scent. Cryotherapy lasts up to 6 hours. Biofreeze can enhance ultrasound treatments massage therapy, electric muscle and nerve stimulation, home therapy and athletic rehabilitation. Active ingredients: menthol 3.5% camphor 0.2%. 3 oz. roll on.