This is a sweat set-up from the apparel brand LEANN MOMENT, produced by Nana Tanigawa. I purchased it at a Hankyu pop-up shop. I've only worn it a few times, so there are no stains or anything. It's a set of high-waisted pants with an elastic waistband and a short-length hooded sweatshirt. It makes your legs look longer and improves your figure. The top is free size, and the bottoms are size S. Thank you for looking.