It is gentle on the skin with thirteen earth-derived ingredients & it can be trusted as it has completed a skin test. It contains moisturizing ingredients providing a moist & soft finish after use. Since it is a high-quality double-sided stainless-steel file it can be washed with water after use & can be reused. Contains 13 kinds of earth-derived extracts such as urea lactic acid glycerin & rhizome root extract green tea extract & cabbage extract to help soften & moisturize dead skin cells. Thirteen earth-derived ingredients as well as urea lactic acid & glycol acid soften calluses & the active ingredients quickly & gently soften them further making it easier to remove calluses with physical force.[COMPONENTS] It is a callus eraser home set consisting of one 100ml foot softener & one stainless foot file.