The natural pumice stone has a harder surface than traditional pumice stones/sponges, making it more effective to use and much more durable. A cotton cord allows you to hang it up to dry the pumice stone after application. Alternatively, the 100% natural loofah shelf included can be used to dry the pumice stone. The loofah tray is washable at 30°C and can also be used as a soap dish. The natural product is the environmentally friendly alternative to plastic pumice sponges. Application note: Wet the lava stone with water and gently rub it over the heel and sides of your feet. For the best result, we recommend final care with the Dudu-Shea® natural cream. Pumice stone dimensions: about 9cm long and 6cm wide. Dimensions may vary as it is a natural product. Loofah shelf dimensions: 12 x 8.5 cm - washable at 30°C, please do not tumble dry