High quality food grade materials: Made from high-quality food grade pulp, coated with silicone oil non stick coating, absolutely not wax paper, non stick, waterproof, oil resistant, environmentally friendly, and safe for daily use. Heat resistance: With a heat resistance of up to 446 /230 , the oven and microwave are safe, making it very suitable for air fryers, bamboo steamers, metal steamers, circular cake pans, etc. Reminder: Before preheating the air fryer, place some food on the top of the inner lining of the steamer to avoid parchment flying out and being burned by heat. Non sticky and easy to clean: Don't worry about food sticking to the air fryer basket or steamer, there won't be any food residue left on the pot, truly saving time! A large number of prepared holes: Having enough holes will help accelerate the steam circulation in an air fryer or steam cooker.