I purchased this new online this summer, but the size didn't fit, so I've only worn it twice and it's in very good condition. It's made of a light material and is comfortable to wear, so I hope those who understand will consider it. Product Number: 116-02-1037 Material: Body: 100% Polyester, Rib: 71% Polyester, 29% Nylon Size: XL Color: Navy The following information is quoted: 【Material Characteristics】 Uses 150-denier polyester. Compared to natural materials like cotton, it is very light and has a moderate firmness and luster. The fine knit makes it light, so you can wear it comfortably even in the summer. 【Design/Styling】 A slightly relaxed silhouette that allows you to spend the hot summer comfortably. The elegant atmosphere of the knit and the moderate luster of the polyester make it stylish even when worn alone, and it can also be used as an inner layer for light outerwear such as shirts and cardigans.