A good helmet is the most important accessory you should purchase if you're intending to ride your bike in a heavily traffic-congested city. Traffic means accidents, and accidents can mean serious injury if you're not properly protected. That being said, carrying a helmet around once you've gotten to where you're going can really be a pain in the ass. Which is where the creators of the Overade folding bicycle helmet saw an opportunity, creating a helmet that shrinks down to about a third of it's size when not in use. Of course, we can't help but wondering, will they hold up upon impact?

Related: Bike Helmet Made From Corrugated Cardboard is Stronger and Lighter

[via Ulele]