Never worn as just found at back of wardrobe, boy now 13 so selling. AI: The Boys U.S Polo Assn. Black Horizon Luxury Cotton Short Sleeve T-Shirt in size 10 to 11 is a stylish and comfortable garment perfect for casual occasions during the summer season. Made from soft cotton jersey fabric, this regular fit T-shirt features a logo accent on the front, adding a touch of branding to the basic design. Machine washable for easy care, this blue T-shirt is ideal for boys who enjoy walking and staying active while looking fashionable.