Rothco ECWCS Gen III Mid-Weight Underwear Bottoms - Mens Level II Midnight Navy Blue Small. Specifications for Rothco ECWCS Gen III Mid-Weight Underwear Bottoms - Men's: Manufacturer: Rothco Gender: Male Age Group: Adults Application: Active Cold Weather Outdoor Fabric/Material: 93percent Polyester / 7percent Spandex Apparel Fit: Regular Moisture Wicking: Yes Fire Resistant: No Odor Control/Anti Bacterial: Yes Reflective/High Visible: No Seasonal/Temperature Use: Cold Weather Features of Rothco ECWCS Gen III Mid-Weight Underwear Bottoms - Men's Moisture wicking polyester/spandex underwear bottoms Part of the Army's Extended Cold Weather Clothing System (ECWCS) Grid fleece material with anti-odor defense properties Elastic waist band Access fly Package Contents: Rothco ECWCS Gen III Mid-Weight Underwear Bottoms - Men's Rothco 69074-MidnightNavyBlue-S: ECWCS Gen III Mid-Weight Underwear Bottoms - Mens Level II Midnight Navy Blue Small