Adjustable- Humanized adjustable size design with anti-scratch and release buckle (Need to be used with the strap, the buckle is on the strap). Users can freely adjust the dog mouth length, easy to wear and install. Safe & Reliable- The dog muzzle made of breathable polyester mesh material protects pets from harm. Effective dog muzzles prevent barking, eating unclean objects, dog muzzles prevent biting, hurting people or objects. Does Not Affect Breathing- The front opening does not affect breathing, the inner layer is thickened and cushioned to reduce friction, the muzzle is easy to clean, machine washable and lay flat to dry. [Does not affect drinking water] - Wearing a mask, the dog's mouth can still be slightly opened, so that the dog can drink water without pressure. Great for dogs with long noses, not for French Bulldogs, Chihuahuas, Shih Tzus or other short nose breeds. Wide application- Various sizes for you to choose (M size is sent by default), you can leave a message if you need other sizes, suitable for all dog sizes from small to large. Ideal for aggressive and energetic dogs when handling safely during training, daily walks, veterinary visits, grooming, or dog travel. Tips: Please measure your dog and refer to the size chart before purchasing.