Finally we have found a proper muzzle! Our male Great Dane feels obviously comfortable in it and he can't put this muzzle off. We have such problem with many other muzzles. Moreover, these muzzles are not expensive in comparison with prices at other dog products stores. The muzzle is not also made according to measurements, but
also suitable for use. My dog gets enough air, besides, there is enough room in the muzzle. The product is worth recommendations!