DOGS CAN PANT AND DRINK: This allows dogs to pant (when hot or stressed) and drink. SUITABLE FOR DAILY WALKS and long periods of wear. SHAPED FOR A CUSTOM FIT: Like a mouth guard, it can be heat shaped using hot water to fit different dog nose shapes. See the fitting guide for more information and to find the BEST SIZE for your dog. GREAT FOR REACTIVE DOGS: you can TRAIN and REWARD treat your dog if he is reactive with other dogs, people or in new situations like the vet. STRONG SAFE: Constructed with strong Thermoplastic Rubber (TPR), the Ultra is SAFE TO AVOID BITE. Extra secure with LOCKING NECK STRAP CLIP, HEAD STRAP and COLLAR ATTACHMENT if needed. COMFORT FIT: Comes in 6 sizes with PADDED STRAPS and NO METAL WORK ON DOGS FACE. Ideal for dog owners looking for muzzles for SMALL, MEDIUM or LARGE dogs. IMPORTANT: Size 547-61cm