We needed to get our 4 year old boxer/rottweiler a muzzle to wear when on walks. We were struggling to find a muzzle he couldn't just take off, while at the same time getting a muzzle he can still have a good amount of room to move his mouth in. This muzzle is perfect. For a dog that hated putting a muzzle on, I am amazed with this muzzle as he doesn't seem to mind wearing it, he just sees putting this on as part of going out, like putting his harness on.