Duofold Varitherm Mens Mid-Weight Long Sleeve Crew, S-Olive base-layer-underwear closure Mid-weight, jersey knit fabric provides ultimate moisture management and warmth for high activity in cold weather. Odor resistant fabric, 360 degree stretch for maximum flexibility and optimum fit. excellent moisture management - quick drying, pill resistant finish. flatlock seams to help avoid irritation, drop tail for added protection against cold.96% Polyester, 4% Spandex jersey