The Black Diamond Cosmo 350-R trekking headlamp is equipped with an integrated 1500 mAh Li-ion battery and generates a power of up to 350 lumens. The elastic band is made of recycled materials from Repreve fibers. The flashlight has several modes allowing you to switch between full power, dimming, zooming in and out, strobe or red light (perfect for reading maps.) The headlamp is also IP67 certified, which guarantees water resistance for 30 minutes of immersion at 1 meter of depth. The digital lock mode will protect it against accidental switching on during transport. The headlamp also has an integrated battery charge indicator.