Cardboard Bike Helmet Better than Plastic

Kranium is a bike helmet that is made from the same cardboard used for the boxes you find at the supermarket. This material, along with some clever construction, turns out to be a lot better at absorbing impact than the more usual polystyrene-filled lids.
Anirudha Surabhi’s design absorbs four times more impact energy that the polystyrene [...]

Source: http://www.wired.com/gadgetlab/2011/06/cardboard-bike-helmet-better-than-plastic/

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