This is a Japanese size S (size 7). The body is made of wool, and the double-layered inner part and sleeves are down. It's warm enough even if you don't button the tailored buttons, just by zipping up the inner zipper. The zipper is double-ended and can be opened from the bottom. The inner and outer parts are not detachable. Measurements: Shoulder width 45cm, body width (underarm) 47cm, length 67cm, sleeve length 60cm. Please use these as a reference. It's a men's item, but it can be worn by women if the size fits. It hasn't been worn many times, but it is a used item, so please consider purchasing with that in mind. Thank you for looking.