I just got this one today actually http://smile.amazon.com/gp/product/B00TW9EE70/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

So far it seems to work well. It was really simple to fold together and stays together with the strip of adhesive it came with. The elastic headband that it came with also keeps it on my head nicely. My only complaint is that it gets annoying with how it rests on my nose. But for 12 bucks I can't say I can really complain.