eflon grills choose kinds of imported fiberglass fabric, coated with imported PTFE and are by special process. It is a new compl PTFE fiberglass oven liner's features: 1. PTFE-fiberglass; nonstick coating on both sides prevent sticking without oils, grease, sprays or butter, easy cleaning, reusable. 2. Prevents spills and debris accumulation in toaster oven; can be cut to fit any size 3. good temperature durability, from minus 70 to 260 centigrade, maximum to 380 4. dishwasher-safe and safe for contact food, chemical resistance etc.