They are made of polypropylene and about 8% rubber. They will stand up to everything but battery acid. They have an anti slip ingredient mixed in the polypropylene to avoid slipping when wet. The most durable tile on the market!

thank you so much . Since the room is in a home in washington St. could you tell me the maker or who might sell them.

There aren't any Tailored Living locations in your area but here is the link to the website that manufactures them http://www.swisstrax.com/ . Hope this helps. Let me know if you have any other questions.

Many thanks for your assistance. wish you were in the area.