Updated with a modern fit, featuring a round neck and designed with superior Airlume combed and ring-spun cotton. Sideseamed. Retail fit. Unisex sizing. (Solid Colors: 100% Airlume combed and ring-spun cotton, 30 single 4.2 oz.; Ath. Heather - 90% Airlume combed and ring-spun cotton 10% poly; Dark Grey Heather - 52% Airlume combed and ring-spun cotton 48% poly.)