The 3D SlimFit headband integrates the HeadLamp's electronics directly into the performance fabric, giving you a comfortable fit with no bounce or slip. This is perfect for fast-paced adventures like trail running and cycling and precise activities such as climbing and summit scrambling.Four lighting modes put you in control, while the USB charging delivers a reliable battery-free performance that can be charged remotely from a power bank during overnight and multi-day trips. The durable materials and IPX4 water resistance ensure that the BioLite HeadLamp 325 can take what you throw at it, giving you full confidence when exploring after dark. 3D SlimFit technology - slimline electronics are weaved into the performance headbandMoisture-wicking smart fabricUltralight - weighs just 50 gramsMicro-USB chargingFront panel tilts downward for easy map readingEasy-adjust clipsIPX4 water resistanceLighting modes: White spot, white strobe, red flood, red strobeLumens: 325Beam distance: 70mBurn time (hours): 3 high, 40 low3000 mAh li-ion battery recharges via micro USBBattery indicator: Green/Red Lens FlashWeight: 50g More info