Shaped Pumice Stone This shaped pumice can be used to buff and exfoliate those tough areas of dry skin – with a handy rope for easy storage and drying after use. Use and care: soak your feet for a few minutes and rub the pumice stone over rough parts of your feet to remove the dead, hard and dry skin. Wash the feet again with soap and warm water. Rinse the pumice with warm water after each use.