BASE LAYER for Cold Weather: What weight, material and fit? For hunting, hiking, camping in winter

This video is about picking a base layer to wear in cold weather. Whether you are planning to be very active or still in cold weather, you should be picking your base layer accordingly. Simon shares his experience with base layers, and how to pick the right one for you.
Gear up on base layer with our friends at REI:
www.avantlink....
In this video:
0:00 - Simon's Experience
0:24 - Long Johns
0:47 - Should you wear cotton?
1:00 - What fabric should you choose
1:46 - Light, medium or heavy weight?
4:03 - How a base layer works
5:41 - Useful features in a base layer
8:40 - How should it fit?
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[@Camo-Dan]

Awesome video!!! Thanks so much for taking the time to explain. I’m literally writing notes on a system to keep warm during extreme cold extended hunting trips in Massachusetts. I didn’t know they made different thickness base layers or that you can get ones with the fancy thumb holes. I’m sold on it.
Do you ever double up the base layers using the thinner one coupled with the thick one or do you just stick to the one you need for the given temperature range and add more layers of insulation or sweaters?

[@LakeHubTV]

I have doubled up base layers in sub zero temps, but they really are made to work best with skin contact. thumb holes are clutch!
-Simon