This patterned dress is made of 95% polyester and 5% polyurethane, so it's easy to wash and doesn't wrinkle even when folded small, making it useful for travel and business trips. The sleeves don't bunch up, so it's easy to wear a jacket over it. There is no lining. An inner layer is needed for the chest area. I purchased it as a size M-L. It feels like a size 10 in the Japanese sizing system. Office Formal Party Elegant