Fireproof and waterproof: Fireproof mat is made of four layered non-itchy aluminum foil silicone coated fiberglass which stands up the temperature up to 2000℉.It has been passed by SGS TEST(UL94 VTM-0 Certified) and CE certification.Fire pit mat is not only fireproof but also waterproof, grease does not stick to them and they are easy to clean.The four layers of material make it last longer and the aluminium foil layer will be more heat resistant and protective,perfect for protecting your deck.Protects your deck and lawn: Charcoal fires can cause irreparable damage to deck and lawn, a fireproof, heat-resistant fire pit mat is perfect for protecting your patio,lawn,composite decking,grass,yard,wood, cement, brick, and decorative stone.It keeps your outdoor floor patio or deck safe from bursting embers and dripping grease.Compared to traditional mats, DocSafe's grill mats are not only more portable and durable but will not tear, curl at the edges or crack due to heat.40" Square: Perfect fit for fire pits, flat top gas, propane burners and charcoal grills of all shapes from 18" - 40". To ensure the best fit for your grill, please measure the width and depth of your grill before placing your order. Please place the reflective layer (aluminium plating) side up (better heat resistance), do not place the heat source directly on the fire mat and keep at least 4 inches of space between the fire pit and the mat.Durable & Portable:The fire-resistant material of aluminum foil not only makes it easy to remove grease stains from your mats, but it can be used multiple times.The collapsible design of the fire mat makes it easy to store and transport, so you can easily take it to parties, picnics, camping trips, barbecues or anywhere else.Trusted after sales service:Every BBQ enthusiast should have a fire mat to keep your floor pristine and protected,allowing you to enjoy your BBQ with greater peace of mind.How do we protect lawns and deck from damage when we use the fire pit? DocSafe keep researching and developing on fireproof materials.We only wish to present the best to customers,to protect your deck.If there any quality problem, please feel free to let us know.We promise to arrange a replacement or 100% refund immediately.