This 4.5-ounce shirt is made from 100% ring-spun US cotton (90/10 ring-spun cotton/poly for Sport Grey and 65/35 poly/ring-spun cotton for Dark Heather, Heather Navy, and Heather Royal) and features a seamless double-needle Inch neck, taped neck and shoulders, a recycled high-performance black tear-away label, a modern classic fit with a seamless body (side-seamed in size XS), and double-needle sleeves and hem.