Most of the headphones are made of plastic except for the metal inserts to adjust the length of the ear cups. Please noteMy rating is based on the product descriptions of durability and not by the result of the usage. I just have to look elsewhere for headphones. Just received my shoes that I?ll be wearing for the Air Force ball. I honestly love them! Imagine putting shot cheap tyres on a brand new BMW. YOU Will probably think its too SMALL. Battery life is great Ive gone almost a full week at the gym before needing to charge these. Im not an audiophile, nor do I have special audio tools to measure their performance. Still excellent condition