The PetSafe Muzzle is padded for extra comfort and has a fully adjustable snout and neck strap for a perfect and comfortable fit. This durable muzzle is ideal for vet visits, grooming and reactive dogs. Use a PetSafe Muzzle to inhibit nipping, biting and barking while still allowing your dog to pant. It is strongly recommended that you work with your dog to acclimate him to the muzzle before using it regularly. Dogs should not wear muzzle for longer than 45 minutes at any given time - less during hot weather. Shapes and sizes of dog snouts vary widely; follow package instructions to ensure proper fit. Always supervise your dog while he is wearing a muzzle.