These are yoga leggings from Inner Fire. I purchased them a few years ago, and it seems to be a brand not yet released in Japan. The fabric stretches well, so although I often wear a size M in my everyday clothes, I wore a size 4 (XS) in these. They are US sizing, so they are equivalent to Japanese S-M sizes. There are no noticeable stains, and I believe they can still be worn. [Size Details/Full Length] XS (4): H: 68cm W: 61cm Inseam: 71cm ■ What is inner fire... A yoga apparel brand born in Vancouver, Canada. The leggings are made in a factory in Vancouver, with printing and all other processes done by hand. It is a popular yoga, Pilates, and exercise apparel manufacturer in North America recently! Type: Leggings