Pumice stone.
pumice stone Pedicure Tips: Keeping Your Feet Moisturized, Beautiful and Summer Ready

Credit: Jam Active Wear

A pumice stone is great to use in the shower between pedicures to keep calluses and dry skin off your heels and the bottom and sides of your feet. Using the pumice stone when your feet have already been treated with coconut oil will make your instant shower pedicure more effective and will keep the pumice from feeling so harsh against your skin. Pumice stones are available at most health food stores for under $5, and a number of grocery stores carry them as well.