Thank you for viewing. Materials: Polyurethane, diatomaceous earth, rubber Size: Approximately 60 x 40cm Weight: Approximately 538g It doesn't break because it's not stone! The rubber backing prevents slipping! A hygienic soft diatomaceous earth bath mat that can be washed whole. If you have any questions, please feel free to ask. The item is stored at home, so please refrain from purchasing if you are very sensitive to such things. Thank you for your consideration.