This jacket is arranged based on the CPO shirt used by the U.S. Navy in the 1950s. The feature of this jacket is the fabric. Using a technique called "water stream fulling," the fabric has a lightness and softness that one would not expect from 100% wool and a voluminous texture. It can also be worn over a T-shirt because it has less of the wool's characteristic prickly feel against the skin. The slightly loose-fitting body of the jacket can be worn over a shirt like a cardigan in midwinter.