Can be precisely dispensed using the foam dispenser bottle that is provided. Simply fill the the dispenser and then spray the foam onto hard skin or corns. Corns and calluses are quickly softened so that they can be removed painlessly without effort. The time to take effect depends on the thickness of the skin but is approximately 5 minutes. Contains Urea, Lactic Acid. No harmful propellants. Saves time filing corns and calluses.