Rothco ECWCS Gen III Level II Mid-Weight Underwear Breakaway Bottoms - Mens Small. These warm bottoms are part of level two of the ECWCS (Extended Cold Weather Clothing System) utilized by active-duty personnel since the 1980s. Specifications for Rothco ECWCS Gen III Level II Mid-Weight Underwear Breakaway Bottoms - Men's: Manufacturer: Rothco Gender: Male Age Group: Adults Application: Casual Color: Natural Fabric/Material: 93percent Polyester / 7percent Spandex Features of Rothco ECWCS Gen III Level II Mid-Weight Underwear Breakaway Bottoms - Men's Thermal underwear bottoms with hook and loop running down the outside of each leg for quick removal when wearing boots - perfect for layering in extreme cold weather Moisture wicking material composition of the winter bottoms keeps you warm and dry Odor-defending grid fleece material Elastic waist bands accommodate most body types Package Contents: Rothco ECWCS Gen III Level II Mid-Weight Underwear Breakaway Bottoms - Men's Rothco 69050-S: ECWCS Gen III Level II Mid-Weight Underwear Breakaway Bottoms - Mens Small