Material: mesh + metal. Suitable for dog breeds: French Dou/Ying Dou/Bago and other short-mouthed flat-faced dogs. Features: anti-eating/anti-biting/anti-eating/drinkable water/breathable/, Velcro design, easy to wear, adjustable size. S size is suitable for: head circumference 36-39cm, weight 8-10kg; M size is suitable for: head circumference 40-43cm, weight 10-13kg; L size is suitable for: head circumference 44-48cm, weight 13-18kg. Made of breathable mesh, comfortable and durable, adjustable size, convenient and simple to wear, not easy to fall off, and easy to clean Before ordering this product, please measure your dog's head size as shown in the picture to avoid improper purchase. Please refer to the size chart to select the size. All-around ProtcetionThe design gives an all-around cover of the dog's mouth, stop from biting and licking, or eating dirty foods from outside.