I purchased this item in December 2021 at a Uniqlo physical store. It's one of several I bought, and this particular one has been kept unworn. I prefer regular-fit long-sleeve T-shirts, not the loose-fit ones, and I own a total of five (two white, three black). Since I wear black less often than white, I'm selling this one... Here's the product description from the official website: 【About this product】 Product number: 446388 Specifications: - This collection is designed by a design team led by Artistic Director Christophe Lemaire, in collaboration with the Paris R&D center, where information on fashion and new materials from around the world is gathered, pursuing a high-quality wardrobe. - Uses HEATTECH, which has heat generation, heat retention, antibacterial, stretch, and moisture-wicking functions. - The front is made of cotton, and HEATTECH functional yarn is used for the inner thread, giving it a look that doesn't appear to be an inner layer. - A long-sleeved HEATTECH T-shirt that can be worn not only as an inner layer but also as an outer layer. - Inspired by vintage military underwear. - Design points include a wide crew neck that is close-fitting and slightly longer sleeve cuffs. - In the material enlargement image, the first image is the surface, and the second image is the inside (skin side). - XS, XXL, 3XL, and 4XL sizes are only available online. Product number: 446388, 442594, 436763, 432513 Please note that the product number and product name on the tag may differ even for the same product. Materials and Care Materials Body: 74% cotton, 9% polyester, 8% rayon, 5% acrylic, 4% polyurethane / Ribbing: 73% cotton, 27% composite fiber (polyester) Care Machine washable, use a net (End of quote) 【Shipping method】Yu-packet Post #Uniqlo2020FW #UNIQLO #HEATTECH Cotton Crew Neck T I plan to list other Uniqlo items as well. Please take a look if you're interested. #Shinbox'sUniqlo