First thank Amazon for the seriousness and diligence of its ultra-fast shipment. Then thank the designer of these foam ear. I was very torn grief of those of my headphones Koss Porta Pro-which I am very attached for convenience (and which is still guaranteed for life) and here I found, thanks to the other comments Amazon customers the miracle product that refurbished in a snap (even for someone clever little) my favorite headphones! What to say! Otherwise a big bravo! Here's my pretty little left headphones for hours of music! I have the impression that in general the foam helmets age very badly (even on very expensive helmets). That deserves great consideration before purchasing these products. Like other customers, I also regret not being able to change the temporal foam headphones. A shame as this lasts several years and delivers a quite decent.