This Floridian is taking notes on the winter gear info - thanks all! For the Frozen 5K of 2015, I wore: long sleeve tech shirt (brushed on inside), tech tights (brushed on inside), cotton short sleeve tee over base layer, wool hat, knit gloves, neck gaiter, down jacket... and I was comfortable. For the marathon this year, I wore: regular (non-thermal) tech tights, (non-thermal) tech long sleeve tee, tech short sleeve tee, mock-turtle thermal long sleeve top, knit gloves, fleece ear warmer, neck gaiter, my son's outgrown knit pajama pants, and his outgrown fleece jacket. I also had heat packs in both gloves, both shoes (until I started), and in my pockets. I made the mistake of ditching the pajama pants and jacket at mile 1 and regretted it the moment I turned onto World Dr, right into the wind - GAH!!! I literally had no feeling in my legs until the halfway point.
I'd like to not repeat that experience, lol, so I bought some thicker, brushed tech tights for this year, and found that I can easily layer them under another pair of tights, as needed. I'm thinking maybe I'd have been well served by throwing a windbreaker on top of my tech shirt layers, yes? I have one of those that I use for rainy days in the theme parks.