These are the Folding Sunglasses designed by studio Klass. These sunglasses have a double joint that allows you to fold them down. These sunglasses are really thin, only 8mm, so you can put them in a smart tiny box so that they don't break.
This would be perfect for me, because I always wreck my sunglasses! I don't think I have managed to have a pair (that I've used a lot) for more than one year, because I always put my glasses right in my purse, in my car or in my pocket, and they always break. I never learn.... Anyway, you can visit www.studioklass.com and look at more of their designs!