This is a single-layer coat designed to be as easy to wear as a shirt. It fastens with a zip and buttons. The fabric is YAECA's 60/40 cloth. This is a modern interpretation of the 60/40 cloth that was popular in the outdoor field in the 1960s. It's a thin yet durable fabric woven from a high-density blend of cotton and nylon. Although thin and light, it has a certain firmness, so it doesn't cling to the skin and feels light to wear. It also dries faster than cotton. The absence of a lining provides a very supple feel. It's a single-layer construction, so it's light, but it still effectively blocks the wind. Wear it as is in spring and summer. In autumn and winter, layering it with something warm like a knit will keep you light and warm. On the outside, there are welt pockets on both sides, and on the inside, there's a patch pocket that can hold a tablet, and a zippered pocket for a wallet, etc.