The durable 600 thread count fabric is heat resistant up to over 500F. This allows use even when the barbecue had been just turned off. The heat resistant fabric will not melt or deform at this typical use temperature. The cover is designed to be breathable and yet waterproof protecting the interior from mold as well as the elements. The unique Coverseal heavy duty weighted tarp apron seals the cover to the ground preventing ingress of rodents, insects and other troublesome creatures. Wind is unable to get under the cover and lift or remove it from the barbecue. The material will also reflect a high percentage of the sun's rays reducing bleaching of the barbecues original color. It is lined with a black bottom surface so any residual burnt soot or other residue will be concealed, keeping the look of your cover clean.