This is a Korean-style puff sleeve blouse! It's thin, so you can wear it from spring to autumn, and even in winter with an outer layer! It has a lining, but it's a little sheer, so I recommend wearing a camisole or something similar underneath. The sleeves don't have lining and are very cute because of the transparency. I only tried this on once when I bought it and haven't used it since, so it's practically new! Please understand that it has been stored at home, and only purchase if you are okay with that. This is an overseas product, so there are no product tags or washing instructions. Please be aware of this. If you have any questions, feel free to comment!