Onemore choice Adjustable Anti-Biting Dog Muzzle,Breathable Safety Pet Puppy Leather Muzzles Mask for Biting and Barking PROTECTION:Protect your children when staying with dogs,also protect your dogs from eating leftovers in the street; GREAT VENTILATION:Holes of the muzzle gives the dog plenty of air,dog will not have hard time panting and breathing during the training; WELL-FITTING & COMFORTABLE:Muzzle is made of high quality leather,trimmed and riveted for extra strength; ADJUSTABLE STRAP:Each muzzle has an adjustable strap with a quick-release buckle,the leather loop in the back easily connects to the collar or leash; MEASUREMENT:Please measure your dog's snout to insure this is the correct muzzle size you need.