Made of food grade wooden paper, environmental-friendly, safe and healthy. It has properties of high heat-resistant, moisture-proof, waterproof and oil-proof, so it is safe for putting on the steamer/grill/oven. Keep your steamer/mould/grill/oven clean from old food residue. It is non-stick, so removing your food easily without sticking. Perfect for using in the steamer to steam bread, steamed buns, cakes etc.