The unique KOVOT non-stick silicone baking mat mat is composed of fiber glass and it’s coated on both sides with non-stick Food Grade Silicone. It is safe to use in conventional ovens up to 482°F and at temperatures as low as -40°F for freezing food (-40°C up to 250°C). You can enjoy a hassle-free baking experience with an easy clean-up. These mats are specially polished to prevent food from sticking to the surface. Your cookies and other baked goodies will slide right off without breaking apart. No cooking sprays, oils or parchment paper needed, helping you save both calories and money. These will quickly become your new favorite kitchen must have item.