Product size: xs9 - 12cm / s12 - 15cm / M14 - 20cm / L18 - 24cm / xl22 - 28CM COMFORTABLE AND BREATHABLE: The practical and reliable dog muzzle is made of high quality nylon material, designed for good fit and durability. Lightweight and eco-friendly, it provides ultimate comfort for your pet. MORE HUMANIZED DESIGN: Different from traditional dog muzzle, the mesh design provides full mouth protection, the dog mouth cover allows you to leave reasonable space for your dog's mouth to breathe, pant and drink. ADJUSTABLE AND BREATHABLE: Adjustable at muzzle and neck strap. Keep the muzzle tight enough to control its bite but loose enough to have freedom to pant and yawn. Most dogs are not accustomed to wearing a muzzle at first, so we need to take the time to allow them to patiently adjust to the muzzle. EASY TO CARRY AND CLEAN: The combination of double velcro and buckle makes it easy to carry a dog cover for a dog. Ideal for aggressive and energetic puppies to use during training or on daily walks around the neighborhood. It can also be machine washed and flat dried.