This item is called the "Quiet Dog Gentle Shush", it's a muzzle specially designed for dogs who bark. The intentions of this item are to silence a barking dog. Keep in mind, that barking is a natural behavior for dogs, whether alert, spooked, bored or playing. A tool that is called "gentle shush" is a big red flag that it's not gentle and NOT being used for the benefit of the dog, but rather the human. (The lazy, ignorant, selfish human that wants a dog just to have a dog. They will leave them out in the yard to alert when strangers come by to make the family feel safe, but not long later, that barking gets annoying. Instead of working with the dog, training them, playing with them, walking them, the simple solution is to muzzle them. This is meant to be a temporary  fix, but time goes by and the family forgets to take off the muzzle or they think it's not bad to leave it on the dog because the label itself says "GENTLE". This is what happens in the real world when manufacturers and supporters of these types of items tell you how great they are for you and your pet. The truth is, if this were really made to benefit the dog, they wouldn't be muzzled at all. Just look at these two dogs, do they look comfortable to you? Start critically thinking and question what you're being told. Don't just believe it because everyone else is doing it. Thinking like that gets dogs killed!