Strimm Adjustable Dog Nylon Breathable Mesh Muzzle Mouth Training Cover Masks Anti/ Stop Chewing Bitting Barking for Small/ Medium/ Large Dogs, Soft Leather Edges This comfortable, easily adjustable muzzle is constructed of a breathable mesh material with a quick snap closure and soft leather edges. A muzzle is a safe and humane way to handle dogs that are aggressive or injured. It prevents biting, chewing, and barking without catching hair or causing pain. It still allows your pet pant and drinking This mesh muzzle is designed for temporary restraint only. Don't leave a muzzled dog unattended. Remember not to use the muzzle on your dog for longer than 20 minutes at a time. Prolonged use or improperly fitted muzzles can affect a dog's panting, or natural ability to cool itself. To determine the proper size muzzle for your dog, take reference of the sizing chart photo before ordering Select the right size: 1. Use string (or a fabric tape measure) to measure your dog's snout, just behind the nose. The muzzle must not be tight 2. Place your forefinger just under the string to ensure enough space for your dog to be comfortable-don't tighten the string, it should be free to move around the dog's nose. 3. Lay the string along a ruler to determine your dog's nose circumference. Find the corresponding size according to the size chart - if it is not an exact match, then take the nearest size