First thing first... these are really, really thin. We're talking stocking thin here. Thicker than women's nylons, but you can definitely see through them. You will be able to see every feature on your body through these. You won't be lounging around the house with anyone but your significant other.

I got these to wear under leathers to keep from sticking. For that purpose, they will do just fine. I also have a pair of Lands' End interlock silk pants, which are much thicker.

The Lands' End pants are good for three seasons. These are good for summer, or maybe a base layer in spring/fall. If you're expecting winter insulation, forget it. Get a pair of Icebreaker wool pants and never go back.

For the small difference in price, I would go back to Lands' End. The LE just fit better, feel better, insulate better, and don't snag as easily. Unfortunately LE are not available all year it seems. If you want ultra thin to keep from sticking to leather, these will work and save a few bucks without fear of overheating.