Yiter Bathtub Mat,Is Safer and Higher Quality than Other Mats,Provides You With a Comfortable and Reassuring Bathing Environment.Note:It is recommended that you should unfold the bath mat after receiving the product. In order to expand the mat better and remove any dirt, please soak it in hot water for ten minutes before using it.Make sure that the bathtub must be clean, without any dirt , smudges, oils. Do not use mat on a textured surface since suction cups will not hold properly as mentioned in description.Before filling the tub and start the shower,please get wet the tub/shower floor with a little bit of water and aim at the center mat with suction cups on underside carefully.Please steadily press on the entire mat surface with your hands and also step carefully on the mat while holding a grab bar, edge of tub or a secure object.If finished the shower, please lift up one corner of the mat and pull it up and then slowly peel it off. Rinse it with water or washed by machine.Hang it up and dry it.Pay attention:Do not use a dryer or radiator.