Just a warning: I bought these in Large based on the "Duofold Men's Long Underwear Sizing Chart" information on Amazon,  L = 38"-40" Waist. However received the package and clearly printed on the back L = 36" - 38". So there is a 2 inch discrepancy in sizing. I have not tried these on yet, debating sending back the unopened package. I'm sure once I get the right size the quality will be good.