With 300 lumens of power housed in a super-compact, watertight body, the Black Diamond Cosmo 300 DF Headlamp is ideal for an array of outdoor adventures. It's more ergonomic with a lower profile for improved balance, and the user interface includes a second switch for easy lens selection. Settings include proximity and distance modes, dimming, strobe, red night vision, and lock mode. Red night vision has dimming and strobe modes and activates without cycling through the white mode.

Waterproof: tested to operate at least 1.1 metres underwater for 30 minutes. If water enters the battery compartment, it will still operate; however, it should be completely dried out after use in wet conditions. Due to its watertight construction, it keeps lighting the way, whether you're forced to bike home in the rain or you're hiking back to camp in an unexpected downpour.

The integrated battery metre display shows the percentage of power remaining. The digital lock mode feature safeguards against accidental use when stored in a pack or pocket. The optical efficiency not only provides brighter light but also saves battery life. It uses 3 AAA batteries (included).