Glove choice seems to need the most fine tuning. I have a couple pairs of winter gloves that seem to do alright in the 40's, but below that I put on a pair of shell over mitts (3 finger type). Sometimes I have to cram so handwarmers in there as well. I need to make a chart to show when I need what hand protection. And under 40, I always need booties and double socks.