Widely Used: Our drainage tiles mat system with drainage holes is resistant to well water and ultraviolet radiation, which can be widely used indoors and outdoors. You can use it indoors, such as swimming pool, shower room, balcony, bathroom, kitchen, etc., and can also be used in various outdoor places, such as terraces, boat decks, dog kennels, workstations, courtyards, saunas, RV and other places, so that you no longer worry about the problem of slippery ground.