Important Note on Muzzle Training: When you first receive the muzzle, please don't immediately put it on your dog's snout. Without muzzle training, it can cause anxiety and resistance in your dog. Please start training gradually in a low-stress environment with rewards. Ensure each step is comfortable for your dog, which can reduce the chance of escape or damage. Ultra-breathable Mesh Muzzle for Full Pant: With its innovative front-opening design, this soft muzzle is more comfortable than fully enclosed muzzles. It will not be stuffy and rub your dogs nose after you adjust the neck strap, allowing your dogs tongue to stick out for heat dissipation. The mesh dog muzzle may have a slight odor from transit. Rest assured, it doesn't harm your dog. Air it for a few hours or wash it with mild soap and water to remove the smell. Safe Muzzle for Correct Bad Habits: This soft dog muzzle effectively prevents your dog from biting, chewing, or carrying sticks and small rocks while allowing your dog to drink water and give rewards. Please keep in mind, Muzzling can't eliminate bad habits, but positive training can. Not for prolonged use, always supervise while wearing. Adjust for Perfect Fit:The Hook and Loop closure makes it easy to adjust the better-fit tightness according to the shape of your dog's snout. This muzzle for dogs is useful for vet visits, grooming, training, walking, wound recovery, etc. Size S: Circumference of the mouth and nose (20-22 cm), length of the mouth and nose (5.5 cm). M: Circumference of the mouth and nose (22-24 cm), length of the mouth and nose (6 cm). L: Circumference of the mouth and nose (24-28 cm), length of the mouth and nose (6.5 cm). XL: Circumference of the mouth and nose (28-31 cm), length of the mouth and nose (7 cm