Headlamps may have started as a camping accessory, but the technology has improved so much in the last few decades that they've made running in the darkness not only possible but also enjoyable. Get ready for the next advancement from BioLight, which has created an ultrathin headlamp that will become the new standard for runners – and anyone else moving in the dark. The 330-lumen lamp sits flush on the forehead, which makes it much less cumbersome when moving. The innovation comes from moving the battery pack to the back of the head, so the headlamp is far more balanced, and you don't have to tighten it beyond comfort to stay in place. You also can forget the batteries, as this headlamp is rechargeable via a USB port, with up to 40 hours of battery life per charge.