They are high temperature, oil resistant, fireproof, non-stick, food safe (FDA), odorless, easy to clean, hygienic PTFE Teflon® products. They prevent glare caused by dripping oil that causes your meat to become charred and dry, preserve its flavor, retain the water in the meat, and protect your meat when it is cooked. The marks of your grill cover on it create a magnificent appearance. Thanks to this product, anyone can become a super grill master. It is very easy to clean. After your grill cover has cooled, remove it and wipe it with a soft damp cloth. It can be washed by hand or in the dishwasher. You can store these covers flat or use them after use. You can roll it up. It will save plenty of space compared to your grill trays. It can be used over and over again and is durable.