Salonpas pain relief patch contains a combination analgesic with 3.1% camphor; 6% menthol; 10% methyl salicylate.. Salonpas topical patch soothes aches and pains in the neck, shoulders, back and joints.. Benefit from fast-acting relief without using any heat.. The sturdy fabric patch moves with your body without peeling off.. One patch gives you 8 hours of comforting relief.. One box contains 20 patches..