Pvc Hundreds of Suction Cups Yimobra superior bath and shower mats feature 169 special big suction cups, The different suction cups adsorption stronger than other small suction cup ,that help hold in place on smooth, clean surfaces. Variety colors available collection Large Size Yimobra Square Shower Mats Size 21 x 21 Inch and provides maximum coverage. Many other mats are smaller leaving areas of your tub exposed. BPA Free, Latex Free, Phthalate free Excellent Drainage Design Yimobra Bath shower mat feature149 drain holes drains water out quickly and keep the mat dry and clean Machine Washable Our durable mat is machine-washable to facilitate hassle-free maintenance and uphold its fresh appearance. We highly recommend that you wash your mat prior to use. Simply throw the mat in your washing machine on cold with gentle detergent (no bleach) and air dry. We recommend rinsing and drying your bath mat periodically to remove oily and slippery buildup that may occur from various soaps and hair products Warning Prevent Falls: Secure suction cups before each use. Mat will only attach to clean, smooth surface. Not for use on textured, tiled, or non-smooth surfaces. Do not use bath oils and jump on the bath mat may cause slipping