I've never worn silk long johns before. Very nice feel. With no pants, they feel cool. Thin like fine stockings, this pant provides surprising warmth when worn under your pants. Silk has great insulation, and natural wicking properties, that will provide great comfort, without uncomfortable rubbing on your skin. When you're watching a football game on a cold autumn day, it's great to have the confidence to know that you can stick it out to the bitter end.
Nice wide comfortable waist band. When you go inside for the victory party, they are still comfortable, because they breathe the heat away from your skin.