These are great headphones in so many ways. Super lightweight, comfortable, and good sound considering their weight and price point. However, like some other reviewers have already shown, there's a design flaw that results in the earpieces separating from the headband and there's no way to fix them unless you just use tape. It's a real shame because they'd be the only work headphones I'd buy otherwise. I have to sit for long periods so lightweight is essential.
Come on JVC, sort out this one problem in a revised upgrade!