Answer (1 of 7): It's a personal choice, I'm an outdoors sort of guy and I've tried pretty well everything in thermals for winter outside and I have settled on thick microfibre or cotton rich/wool tights of 100D or over. In these I know my lower half is going to be toasty warm.
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Do leggings really keep a girl's legs warm in winter? They're so tight. I'd think baggier pants would be better since there would be some air space to hold the warmth of
What should I wear under jeans to stay warm? - Quora
Are tight or loose clothes warmest to wear in winter? - Quora
Are tight or loose clothes warmest to wear in winter? - Quora
What can I wear under my pants so you are not cold during winter? - Quora
What is the best way to dress for winter if you have to wear a skirt or dress with tights, hosiery, or pantyhose for work, but trousers are not allowed (for men)?
Are cargo pants good for winter collection? - Quora
What do you wear in the winter with tights? - Quora
What is the best denier of tights to wear under jeans in winter? - Quora
What is the best way to dress for winter if you have to wear a skirt or dress with tights, hosiery, or pantyhose for work, but trousers are not allowed (for men)?