These are a great base layer.  Husband's been wearing these for years.  He works in a shop that is minimumly heated. This purchase was a replacement for a pair that finally wore out after many years of service. He likes the ones that have some wool in them.  The wool isn't next to your skin so no itchies.  A great improvement over the old waffle weave long johns.  Quality is what you would expect from Duofold.