Extra large bathtub mats: No chemical smell, vinyl quality material. Heavy duty and standard dimensions and rectangle's shape makes it lays flat in any smooth bathtub floors. Non-slip shower mats with hundreds of suction cups: Anti-slip bath mats features suction cups that help hold in place on smooth surfaces. Powerful suction cups offer 360 degree safety protection for users. bathtub mat is a great choice for the home, gym, spa and more! Multifunctional and utility: Looks like pebble design, provide massage experience in shower time, featuring necessary anti-slip function, meanwhile extra large mat is 15.7 inch x 39.4 inch which provides excellent coverage and also features small holes throughout to allow water to circulate. Machine washable and durable: Machine washable to facilitate hassle-free maintenance. To clean at any time, simply toss the mat into the machine and enjoy its fresh appearance. Air dry for years of safe, healthy, hassle-free to use. Warning: Bathtub mat only attach to smooth and clean surface. Don't for use on textured, tiled, or non-smooth surfaces. Do not use bath oils in case of slipping.It's recommend to allow the mat to air out in a well ventilated area for 24 hours before use if you encounter a strong odor when the package is first opened.