U.S. Military Desert Sand ECWCS Gen III Mid-Weight Underwear Waffle Bottom Drawers USA MADEUS Military Desert Sand ECWCS Gen III Mid Weight Underwear Waffle Bottom Pants U. S. A. MADE Introducing the ECWCS (Extended Cold Weather Clothing System) Mid Weight Thermal Underdrawers. These pants are an essential base layer for military and tactical professionals. These are some of the best thermals on the market! The quality is outstanding, a night and day difference compared to ANY NON USA imported copy! If you want some of the best of the best,