Mens short sleeve polo shirt. Quick drying coolweave build. Moisture wicking fabric moves moisture away from the skin. 100% polyester. Regatta mens sizing (chest approx): xs (35-36in/89-91.5cm), s (37-38in/94-96.5cm), m (39-40in/99-101.5cm), l (41-42in/104-106.5cm), xl (43-44in/109-112cm), xxl (46-48in/117-122cm), xxxl (49-51in/124.5-129.5cm), xxxxl (52-54in/132-137cm), xxxxxl (55-57in/140-145cm).