Rothco Gen III Silk Weight Underwear Top Black 3XL Black-3XL. C.W.C.S. System helps provide extra warmth in cold climates. Rothco''s silk weight underwear top is highly breathable with moisture-wicking properties and features anti-microbial & anti-odor propertieswhich protectagainst bacteria and bad odors from forming. The level-1 underwear top also has a long back tail and thumb-hole sleeves. It''s great for layering in the winter time and works well with our other ECWCS items or underneath t-shirts jackets and more.' Specifications for Rothco Gen III Silk Weight Underwear Top: Manufacturer: Rothco Sleeve Length: Long Age Group: Adults Apparel Fit: Regular Gender: Male Shirt Style: Base Layer Shirt Fabric/Material: 100percent Polyester Condition: New Neckline: Crew Moisture Wicking: Yes Odor Control/Anti Bacterial: Yes Seasonal/Temperature Use: Cold Weather Features of Rothco Gen III Silk Weight Underwear Top Material: Polyester Material Specs: 100percentPolyester Weather: Cold Weather Package Contents: Rothco Gen III Silk Weight Underwear Top Rothco Gen III Silk Weight Underwear Top Black 3XL 64022-Black-3XL