GU 2-Way Neck Ribbed Sweater (Short Sleeves) This is a ribbed sweater with a simple design. It features a 2-way design that can be worn both front and back, with a boat neck and a wide V-neck. The tight silhouette allows you to enjoy a well-defined coordination by adding volume to the bottoms with wide pants. Material: 81% Rayon, 19% Nylon Size: XL This is a "god-tier knit" that was highly praised by professional stylists for its firm texture that doesn't cling to the body. It can be worn as either a boat neck or a shallow V-neck. The size is XL, but I, who usually wear size M, could wear it with a moderate amount of room. Please feel free to comment if you have any questions.