Salonpas Topical Pain Relief 3.1% - 6% - 10% Strength Camphor / Menthol / Methyl SalicylateAbout Salonpas Topical Pain Relief Patches (20 Units) 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