This casual men's long - sleeved pullover shirt is a great addition to your wardrobe. To wear it, simply pull it over your head. It's suitable for various casual occasions like hanging out with friends or running errands. When it comes to sizing, always check the size chart as different suppliers may have different measurements. If it's an Asian - sized shirt, go for a larger size for a better fit. For maintenance, it's recommended to machine - wash it in cold water with like colors. Avoid using bleach as it may damage the fabric. You can tumble dry it on low heat or hang it to dry. This shirt made of polyester and spandex will maintain its shape and comfort with proper care.