For temporary relief of minor aches and pains of muscles and joints associated with strains, sprains, bruises, simple backache and arthritis. 3% menthol and 10% methyl salicylate. Salonpas topical patches feature rounded corners for comfort. Spray can contains 118 mL of topical analgesic. . WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, go to www.p65Warnings.ca.gov.