 G.I. Type Foliage Poly Pro Zip Top These folliage green extrended cold weather clothing system (ECWCS) polypropylene "long john" thermal long underwear shirts or tops keep our soldiers warm when they are on duty, so you know they'll be great for your outdoor tasks. This is heavy duty stuff with a thick zipper col... |  Extreme Cold Weather Polypropylene Crew Neck Top GI black extreme cold weather underwear. 100% polypropylene, soft fleece lining, crew neck shirt. |  100% Polypropylene Expedition Weight Long Underwear Crew Red Rock Thermals are perfect for hunting, fishing, skiing, hiking, and beyond.
Features of Polypropylene - Expedition weight provides maximum warmth and comfort. - Low thermal conductivity results in more heat being retained for longer lengths of time. - Moves moisture away fro... |  Coldmaster 100% Polypropylene Thermal Shirt Stay warm during those cold temperatures! Coldmaster means just that - master the cold. Indera Mills manufactures the "Coldmaster Long Johns" brand of fine knitted thermal underwear. Coldmaster makes lightweight thermal garments to make living in cold temperatures pleasurable. Co... |  Duofold Men's Polypropylene Mid Weight Single-Layer Thermal Tagless Bottom Lightweight all purpose stretch rib knit fabric provides thermal insulation and outstanding moisture management. |