Smoke easily moves through mesh to flavor food and keep grill grates clean. 2. Snap button fasteners so your food stays securely inside the bag,Grill food without losing through grill grates, the bag is easy to flip & turn. 3. Easy to use, simply place your food in the bag, snap it shut, and throw it on the grill. 4. Material: glass fiber + Teflon 5. Temperature resistance: 260 degrees Celsius/500 degrees Fahrenheit