I buy these headphone less then 4 week ago and have use they moderately since then . a few day ago I notice that a piece of the lock clip on the top of the headphone have break and today I go to unfold they and the whole lock clip break ! the noise cancel ability of these headphone be great for the price and with a decent battery you can get more than 24 hour of use from they . I have never drop they or do anything that would compromise the integrity of the plastic . so that lead I to believe that the plastic that they use to make they must be of a very low quality . the best noise cancel in the world be useless if you can not wear the headphone that have it .