Well, I am a small woman who sweats buckets. I mean, buckets. I have a hard time regulating my temperature in cold weather riding; I often end up feeling too hot, because I am afraid of feeling too cold! But, I am getting better. It just means that a few pieces of cycling wear that I bought years ago are really too heavy for me to wear as a mid layer. I'll end up wearing them x country skiing at really low temps, though.