This is a Patagonia Micro Puff Hoody that I purchased about 10 years ago. It's a size S, but it's a US size, so it's equivalent to a Japanese M size. I bought it used, looking for one in good condition, but it's too warm for everyday wear, so I've mostly kept it stored at home without wearing it. I checked it again for this listing, and I think the condition is quite good. Thank you.