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From Design News magazine - the Bering Co., a French firm that specializes in wearable motorcycle gear, has rolled out a jacket that doubles as an airbag. Send it a firing signal and the jacket will puff up with 21 l of compressed helium, cushioning the cyclist's body before it strikes the bone-breaking surfaces.
The jacket is triggered by a set of accelerometers in the bike's forks connected via Canbus to the cpu and wireless to the jacket. No tether to the bike is needed.
They've been on sale in France since last November, and they claim to have sold about 500 of them at 590 Euro (approx. $820). Looking at the inflated jacket, it doesn't seem to fill much in the neck area, it filling that space to reduce neck motion would be important.