Cuff seams do not stretch!
If you are like me and you pull your long underwear up onto your calf so that it doesn't ball up in your boot then these are not for you. I do not have fat calves, but the seams on the cuffs of these long underwear do not stretch at all, and they were pinching my calf all day long... Not comfortable at all. Also they are more of a lightweight layer - these are the thinnest long underwear I own. All 3 pairs of my 686 long underwear are much warmer.