Featuring 350 lumens of power and an ultra-compact waterproof housing, the Cosmo 350 headlamp is perfect for urban outings and nighttime adventures in the woods. Equipped with a new compact optical assembly, the Cosmo is more ergonomic and better balanced on the head. It also features an updated user interface that includes a second switch for easier lighting mode selection. The new Cosmo 350 can be powered in two ways: either with the rechargeable BD 1500 Li-ion battery or with three standard AAA batteries. The updated reflector delivers increased output while conserving battery life. Thanks to its fully sealed waterproof construction, the Cosmo provides reliable illumination in bad weather, whether you’re biking home in the rain or arriving at base camp during an unexpected downpour.