Bioswiss 2 In 1 Pumice Stone - 1 Ct. Bioswiss 2 In 1 pumice stone can be used on wet or dry feet. It is ideal for exfoliating and removing stains, corns, and calluses. All of our store items are sold individually so please use the drop down menu if there is a variation on the item. Please visit our Simply Hair Accessories Store to see all of our items.