Fits perfectly in the bottom of your oven to prevent messy cleanups. Wipes clean with warm water. Oven safe up to 450-degrees Fahrenheit. Do not place oven liner on bottom of the oven that is in direct contact with the heat source, place on lower wire rack. You may place baking dishes directly on the oven liner surface. Not for use in toaster or convection ovens. Do not use self-clean mode with oven liner in oven. Do not cover or block any holes inside the oven. Covering holes could cause unsafe carbon monoxide levels. Do not use in conjunction with aluminum foil. Made in China.