The use of pumice stone to soften skin dates back to ancient times. And now, in the age of AI, it is still used for the same purpose.
This one, from the Care Essentials line by the German brand Birkenstock, which you'll know for its anatomical footwear, is made from 100% recycled glass. This is interesting because it utilizes waste compared to traditional pumice stone.
More advantages: this material is more hygienic and lasts longer. It is carved to effortlessly remove dead skin. And it does so without irritating and by taking care of your feet.