Kitchen HQ 4-piece Professional Reinforced Silicone Baking Mat Set Inspired by professional French silicone baking mats, our Kitchen HQ mats feature a fiberglass mesh inside the oven-safe silicone, which provides both durability and acts as an excellent conductor for even heating and baking. No more wasteful and difficult-to-use parchments paper or aluminum foil, these mats are designed and tested to be used repeatedly. Because of their unique heat conductive fiberglass reinforcement mesh means they even bake more evenly. Think beyond just cookies: chocolate, caramels, rolling out dough, use in the freezer, even as a nonslip mat for your cutting board. What You Get (2) Half sheets Rectangle shape Square shape Use & care guide