Uniqlo's Ultra Warm HEATTECH, brand new and unopened. It's a crew neck T-shirt (long sleeve) in navy, size XL. - Chest size: 104-112cm - Material: 35% polyester, 34% acrylic, 23% rayon, 8% polyurethane I just bought it, but I mistakenly thought it was short-sleeved, so I'm selling it. Thank you for looking.