The quality of production is decent, but there is one but-weigh twice as much as usual and the clasp on the strap is extremely unsuccessful. If samples such as Arena or Adidas have a strap "cut" and lies on the back of the head, then this sample it "moves" even on a dry head. Earplugs, too, in my opinion, useless. They are too "flimsy" so minus 1. in the case has not yet tried. Perhaps later I will add information.