Regardless of the reason, this is also a flex point, as tension will be placed on this hollowed out arm every time that you spread the headphones to put them on your head

Good sound quality but weak arm design

Cheap plastic arm snapped in two places when putting them on

Regardless of the reason, this is also a flex point, as tension will be placed on this hollowed out arm every time that you spread the headphones to put them on your head

These arms have now broken in three different places and from the reviews

Do not buy, as they will break after the warranty period is over, and Sony doesn't care that they are selling defective products.

There are other headphones that not only sound better, but are cheaper and won't break nearly as often as this pair does