Baking mats are made of silicone and premium fiberglass,which is BPA free, non-toxic, odorless. The silicone baking mats never tarnish or fade and will serve you meticulously for years, a must-have kitchen accessory. This silicone cookie mat is non-stick and can be easily washed with warm soapy water or in a dishwasher, even if grease or dough sticks to the surface, resistant to stain and stick.