Material-made of high quality stainless steel and durable pu leather adjustable-the leather belt length is adjustable with good tensile properties, safe and reliable designed for x-large dog anti-biting,barking.Preventing eating off the ground.Ideal solution for grooming,off-leash walking,vet visit. One of the dog-training essentials,wont have hard breathing during training,lightweight and ventilated. Please use a tape to measure around your dogs muzzle before order