CLIMATESMART Men's Flex Fit Lightweight Long Sleeve Crew Neck Baselayer Top 87% Polyester, 13% Spandex Imported Machine Wash Versatile year-round lightweight performance base layer Breathable stretch jersey moves with you for optimal fit and maximum comfort Body conscious performance fit, ergonomic flat side seams for comfort Moisture wicking helps keep you dry, antibacterial fabric helps reduce odor Long sleeve crew, tag free