Salonpas Topical Pain Relief 3.1 - 6 - 10% Strength Camphor / Menthol / Methyl salicylate - 6 Count PackSalonpas 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 six 9. 2 x 14. 4 centimeter patches.