CLIMATESMART Men's Climateflex Long Sleeve Crew Neck Midweight Baselayer Top 96% Polyester, 4% Spandex Imported Machine Wash Highly breathable midweight performance base layer Soft jersey and spandex blend fabric stretches to allow greater mobility for ultimate performance Body conscious performance fit, ergonomic flat seams for comfort Moisture wicking helps keep you dry, antibacterial fabric helps reduce odor Long sleeve crew, raglan sleeves, self-turn-back cuffs and hem, tag free