Julien Bergignat and Patrice Mouille's wicked Tatoo Helmet folds flat for storage, and clicks together when it's time to protect the noggin. Made of polypropylene strips that cleverly bend inwards to converge at two points that are then held in place with an integrated fastener, the Tatoo gets its inspiration from the armadillo ("tatoo" in French).

Tatoo, Bicycle Helmet from Opton on Vimeo.

You can see more of Bergignat's stuff on Coroflot.

via fast company