The Petzl Nao headlamp is one of the coolest gadgets in existence today. The hands-free, responsive adjustments of the sensor-equipped Nao headlamp gives you exactly and specifically what you need: light, nothing more, nothing less.
Essential for winter use, the Nao will adjust its lumen output on its own, without the user ever having to take off their gloves to brave a button press bare-skinned. The Nao's automatic wherewithal to give its users necessary illumination anywhere from 7 lumens all the way up to 355 lumens(!) makes the Nao, Petzl's "brightest" headlamp.
That is why Outside Magazine selected it as the best headlamp to have when winter camping in the upcoming 2012-2013 season.
Petzl's Nao video: here