Definately for below freezing temperatures
Reviewed by outdoorBuilder from seattle, wa on Sunday, November 22, 2015
Very thick and warm. Too warm for me if it's above 40 degrees. These work great as an insulating layer. The fit for me is good. I wear a 30x32 jeans and the mediums fit nice. not too snug, not too loose. I'm going to buy a few more pair for working outside in the winter.