88% Polyester, 12% Elastane. Thumb hole at cuffs. Stretch binding at hood. Flat stitched seams. Concealed pocket in side panel. Quick dry. Wicking. Trespass Mens Chest Sizing (approx): S - 35-37in/89-94cm, M - 38-40in/96.5-101.5cm, L - 41-43in/104-109cm, XL - 44-46in/111.5-117cm, XXL - 46-48in/117-122cm, 3XL - 48-50in/122-127cm.