This product is imported from Germany materials to hinder the growth of bacteria and fungiand the selection of mint extract can effectively remove the odor of footwear and foot.lt can prevent beriberi infection or suppress beriberi attack with long-term use. Safe, non-toxicharmless - the advantages of this product is high efficiency, non-toxic, no pollution, no sideeffects,and can remove the bad odor. No chlorine, heavy metals, no irritation to the skin, nocorrosion to the shoes, no staining, no bleaching. Colorless, odorless and transparent -.- thisproduct is colorless, mint clear liquid.