Sporting Sails

A notable effort from a group from Santa Barbara, California, the Sporting Sail is a multi-purpose, wearable sail to help speed up, or slow down a variety of existing sports.  Skaters, snowboarders, and skiers can use it to regulate their downhill speeds.  Stand up paddlers and kayakers can use it to travel downwind.

The device is fairly basic and not a sport in itself, but could offer a unique twist on many extreme sports.