100% Organic Cotton, and 100% will be mistaken for a vintage sweater. In the perfect stolen-from-the-back-of-your-dad's-closet fit. Long sleeves, wide, boxy cut. Worn only a few times and although I love it, it's just a tad too large for me. It is a size large but fits like an XL. Pit to pit flat lay: 26" Collar to hem: 23"