Other Information: Store between 68 degrees to 77 degrees F (20 degrees to 25 degrees C). Misc: Net 6 cushions; 4 medicated disks. Salicylic acid. Designed to stay on all day! Removes calluses safely & effectively. Soft cushion protects callus from painful shoe pressure. Medicated disk safely removes callus. Soft cotton and foam cushion protects callus from painful shoe pressure and friction. Patented formulation. drscholls.com. A subsidiary of Merck & Co., Inc. Product of Brazil.