This is the 2018 model M, which corresponds to the current L. The fabric used until 2018 was stronger than the current one, and the fit is slightly more oversized than the current L. This is the Yamato Michi Merino 5-Pocket Pants in navy, size M. This is a popular model that quickly sells out. It has been opened, but it's in excellent condition with about 5 indoor try-ons. The box and postcard are not included.