2 piece collar. Chest pocket. Button fastening. Quick dry. 100% Polyester. 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.