CLIMATESMART Men's Proextreme Heavyweight Baselayer Long Pant 65% Polyester, 35% Rayon Imported Machine Wash Highly breathable heavyweight performance base layer Exceptionally soft, breathable flat-ribbed fabric provides warmth and comfort in extreme conditions Body skimming fit, ergonomic flat seams for comfort Moisture wicking helps keep you dry, antibacterial fabric helps reduce odor Functional keyhole fly, medium-rise, ribbed cuffs, tag free