The tightening mechanism relies upon captive nuts held in place by. DIRECTIONS POORLY WRITTEN. I used these while I was mowing our yard without any issues since they are waterproof. ?? Voyons tout de suite LES POINTS POSITIFS :??Chaussons super confortables??Chaussons bien chauds??Chaussons qui donnent 1 à 2 centimètres de hauteur en plus sans talons??Chaussons résistants qui durent au moins 1 ou 2 ans (plutôt 2 ans)??Chaussons qui tiennent bien au pied??Chaussons qui taillent juste (choisissez votre pointure habituelle)??Chaussons qui ont une belle ligne qui ne se déforme pas??Semelle 100% cuir??Haut et intérieur du chausson en 100% laine??Qualité de fabrication excellente? And all of them normally cant make it more than 3 to 4 months in my knowledge. Ich werde mir kein fünftes paar Sennheiser CX 300II kaufen und mich anderweitig umschauen, falls jemand gute Erfahrung hat, bin ich in den Kommentaren ganz Ohr. Game changing. Were the type to hold on to our tech long as poss, in spite of the ever emerging new versions. That is a good sign for a good cable, as no electrical fields are going through that thing. It has an edge on it that goes slightly above the screen (I included a pic of this) so I think that should provide adequate protection to the screen.