This is a men's long-sleeved shirt from Mountain Hardwear. I bought it a few years ago, but I don't wear it much, so I'm selling it. The underarms are made of mesh material. It's an international size M, which I think is about a Japanese size L. (Width approx. 63cm, Length approx. 74cm) There are no noticeable scratches or stains, but it's a used item, so please refrain from purchasing if you are concerned about minor details.