Superb muzzle is having a hard time understanding what he can and can not chew on. This muzzle has fixed that problem. When first fitting him I needed a couple extra holes for the chin strap, easily fixed with a leather punch. Once that was done he could not slip it off. The chin strap is also removable, so if you wanted to use it with a collar you could. First go round I only had him wear it for 10 minutes and allowed outside play time with his sister. Once playing he didn’t seem to mind it. This muzzle is a bit heavy as the leather is very thick. There is a felt pad on the bridge of the nose for extra comfort. Very well made and no way your dog will chew through this. The only thing I would improve on is ventilation, due to the leather being so thick I can see it being very hot. Be sure to properly measure your pup before purchase! Bonus, your dog kind of looks like Bane with it on! Lol