I purchased this a few years ago from the L.L.Bean official website and have only worn it once a year for outdoor event management. The size is US size S, which is equivalent to a Japanese size M. It's suitable for me, who is 170cm tall, unless you are overweight. It's very warm, but it's a bit heavy, so I don't recommend it if you have stiff shoulders. It has many convenient pockets. You can remove the inner down jacket and use either one. I have never had it cleaned to maintain its original functionality, so please be aware that there is some soiling on the collar and cuffs. For other details, please see the L.L.Bean official website: https://www.llbean.co.jp/mens/outer/g/107377.html?cgid=101060