Danger: Collisions

Why should skiiers and mountain-climbers have all the fun? Bikers can get their own protective airbags, courtesy of Sweden's Hövding. The bag is worn deflated around the neck, like a big collar. Sensors can tell when the biker's involved in a collision, inflating the airbag around the head in a tenth of a second. And, because it zips around the neck, bikers don't have to worry about helmet hair, either.

Click through to see the full slideshow at The Condé Nast Traveler.