Button closure Fabric:95% cotton,5% spandex.Skin friendly,soft and comfortable. Style:Classic polo shirt,summer shirt short sleeve,slim fit,pullover t-shirt with button-down collar.Contrasting design at neckline and cuff make it a stylish polo too. Occasion:Casual shirt,suitable for daily life,work,travel,sports such as running,tennis,biking ,etc,very breathable and durable. Color:Many colors for you to choose.Whether you want to buy understated colors or bright,vibrant colors,we can all meet you. Size:US size.Before ordering,please refer to the size chart,especially the CHEST and SHOULDER.