It is made by 100% nonstick food grade silicone gel,very easy to clean.Heat resistant,can be used 4000 times repeatedly.We made these by ourselves,the price is very cheap but high quality,you can use it trustingly. 1.good character,non stick,easy clean 2.heat resistant,can be used 4000 times 3.100% food grade silicone gel 4.standing temperature -40~280 degree 5.passed FDA, LMBG test report 6.provide even heat , stable dimension, high strength 7.color printing, packing and dimensions can be made according to customers' requirement