These men's casual shirts are great for daily wear. To put them on, simply open the single - breasted closure and slip your arms through the full - length sleeves. When choosing a size, always refer to the size chart. Since the items come from different suppliers, each one may have a unique size chart. If it's an Asian - sized shirt, go for a bigger size. For maintenance, these shirts made of polyester, cotton, and microfiber twill fabric can usually be machine - washed in cold water. Avoid using harsh detergents to keep the colors and fabric in good condition. Hang them to dry to prevent shrinkage. These shirts with a square collar and striped pattern are perfect for teenagers who love the youth pop style.