Because it's reusable, this liner is an eco-friendly option. Use it up to 5,000 times, rather than purchasing other liners and constantly throwing them away! This mat has pre-cut corners, allowing for easy removal from a quarter size sheet pan. It also features an attractive green border for easy identification. It's safe for use between -40 and 480 degrees Fahrenheit. Plus, with even heat distribution, this pan liner is a seamless addition to any baking process.