CLIMATESMART Men's Proextreme Long Sleeve Crew Neck Heavyweight Baselayer Top 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 Relaxed fit, ergonomic flat seams for comfort Moisture wicking helps keep you dry, antibacterial fabric helps reduce odor Long sleeve crew, raglan sleeves, 2-1/2 inch ribbed cuff, tag free