The light and bezel feel sturdy, the head strap feels strong, and provides enough elasticity and adjustability for most if not all head sizes.

Fortunately, I wear a hat most times, so in that use it fits securely with no major bounce or slide. I tried a very low bun and very high bun—the latter seemed preferable though it was annoying to have to redo my hair just to put on the headlight and I still had to angle the battery a bit off of vertical. As John noted above, it is simply too much to wear on the head, so after trying one time, I have converted over to keeping the battery in a pocket, which is far more reasonable.I run every day, and on “rest” days I often don’t prioritize my run and weekly end up just chilling out for 3-4 miles after 10 pm. In fact it is almost too bright to use on roads and IMHO is best suited on trails and in the mountains.

It is certainly less bright, but still offers a spread out warm hue that allows you to see objects in the 20-50 foot range fairly well.It fits into a plastic holster, but the plastic holster is uncomfortable at best, because it has no form of friction to hold it on the head without sliding down as I run. I do like the option however to be able to manually adjust the lamp to spot for distance to try to decipher what kind of eyes are out there looking back at me. Jeff V: One complaint I have had with traditional LED headlamps has been the harsh and sterile white hue. Jacob: There are a lot of positives with the 10R: nice color temperature, bright, easy to use, long battery life—poor fit is the critical negative. Rear Light, on the other hand, consists of a rear red light designed to guarantee visibility even from behind, while thanks to the Transportation Lock you can travel without the risk of accidental switching on.