Bought this muzzle for an 8 month old male euro Doberman pup that, when on walks, has been getting progressively more frustrated at my restraining him from other dogs we passed that he has started nipping at my legs. Got bad enough that I had to put public walks on hold. This muzzle is top notch quality and is allowing me to take him anywhere and focus on training instead of worrying about bites. As advertised it allows him to pant and bark. I'd still be cautious though on hot days. The products I've bought from this site so far have been excellent quality and reasonably priced.