100% food-grade silicone (BPA free) and the lifetime can be several years. The fondant rolling mat is 19.7'x15.8' (50*40cm) and 0.03' (0.8mm) thickness. Maximum working temperature is 230 C(446F) The silicone pastry mat is non-stick and the release is also good so you don't need any flour. This is a really non-stick pad for making cookies, macarons, bread, and pastry. It will make cooking and baking more productive The silicone sheet with the great friction on the back grips the countertop well. It is super hard to move as you roll out the dough and always keep stable on the table Simply wash the silicone baking mat with water or place in the dishwasher to clean. It can be stored rolled up or folded, occupying minimal space in a drawer or cupboard It is 0.8mm thickness and thicker than most pastry mats which are only 0.5-0.6MM.This fondant mat is much thicker and durable, so it is very hard to crinkle and move as you roll out the dough.