Shaka-shaka material. The sleeves, hem, and neck are made of jersey material, making them soft. I've only worn it once, and there are no noticeable stains. From around 2005. Size: O (Large) Because it's thin, it can be worn under a jacket, or it will be great in the spring when it gets warmer. It has been years, so the washing instructions are not visible, but there are no tears or noticeable stains on the product.