BSEEN 1 Pack for 2 PCS LED Armband, Running armaband, LED Bracelet Glow in The Dark-Safety Running Gear.

Running in the wintertime is not fun for a lot of reasons, but safety is a big concern for me. Let me clarify... "visibililty" is a big concern for me.  These work extremely well for keeping you highly visible between the dusk to dark timeframes. At almost pitch black they just make you look awesome if you're running at a decent clip.  I keep one on my forearm and one on my ankle.  You might say it looks like a geek running down the sidewalk, but at least I'm a safe geek!

Check them out at Amazon.com
BSeen Running Arm Bands