Other Information: Store between 68 to 77 degrees F (20 to 25 degrees C). Misc: Removes calluses safely & effectively. Provides pain relief & immediate cushioning. Easy, one-step application. Designed to stay on all day! Salicylic acid. Medicated disk removes callus while cushion relieves pain. Patented formulation. Contains natural rubber latex. drscholls.com. Product of Brazil.