This is a sleeveless shirt designed like those worn by marathon runners. I've been using it as loungewear and have no connection to track and field, so I'd like to offer it to someone who would use it for its intended purpose. However, due to its size and design, I think it could be used in various ways, such as for running and training, as underwear for everyday wear, or as gym clothes or practice wear for children's club activities. If you are around 160cm tall, it should have a relaxed fit. It's also made of a dry-fit material, which is quick-drying. If anyone feels they have a need for it, please feel free to use it. *There is some wear and tear. Please understand that this is a used item.