Traditionally, Iaido doesn't have much of color selection of gi and hakama. For practice and taking shinsa, you would wear black hakama. Some advance level iai students would wear a custom made hakama for shinsa (exam). It's nice that the hakama is not 100% cotton cause for me I wouldn't want to iron every time. This is much better and you don't need to iron cause the pleats will stay in place. Nice to have the sizing chart in handy.