Perform products produce pain relief through the use of a process called cryotherapy. Also known as "cold therapy," cryotherapy is the application of cold to decrease inflammation and relieve pain. Perform Pain Reliever is a unique external analgesic that puts your pain on ice. That's because it uses menthol as well as cold therapy (Cryotherapy) which is the application of cold to decrease inflammation and relieve pain for fast-acting, long-lasting relief of your aches and pains. Herbspro.com is proud to carry the entire range of this fine brand.