Purchased at an antique shop China jacket Size is listed as XS, but I think it's closer to a size S (fits perfectly on me at 153cm) Material: Silk Viscose (a type of rayon, the oldest synthetic fiber made from natural materials, known for its luster and texture. It feels smooth and cool to the touch, is soft, and fits the body well) It has a velvet-like fabric, so it has a sheen ⚪︎ It's cool to the touch, so it's not as hot as you'd think. I think it can be worn year-round except in mid-summer.