It is of a good quality material but does not have stiches all around. I hope at the time to wash it it does not separate.
Not sure yet how to put it correctly in place (no manual), but I'm not sure it'll work: even tightened to the maximum the jaw can still open a little bit, so I imagine snoring might happen. Not the fault of the product though, but of the human body : the flesh between the chin and the jaw bone is flexible enough to allow for some movment :)