I wear this shirt under another when I need an extra layer on a cool or windy day. Works great in that respect. Softball and golf are particular activities where it's come in handy on cold days. I probably wouldn't wear it on it's own, but as a base layer it's great.
I used to wear wool base layer next to my skin, but I found by switching to fleece as the base layer, and one layer of wool long johns keeps me warm in freezing weather. It is fleece so it seems to want to stick to your jeans when you put them on, but put a wool layer over the top and I solved my problem. Best combo I have found.
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