idk
this product is real cheap. the stone came broke, so i returned the item and got my money back, no problem with shipping and returns. the seller did not want it back so i decided to try it out anyway. i have no problem with it slipping and my feet is a size 8 in womens. my husband however it slips for him all the time and his feet are a size 14 in mens. i foud that you have to push it down before every uses to make sure its not going to move. the bristles aren't hard enough to clean off dead skin but it helps to just clean your feet like a bath sponge, so i only would suggest this that you are not able to clean ur feet and are desperate for something to help you clean your feet. good luck!
Rating: 1 stars