Material Composition: 92% Polyester & 8% Spandex Washing Instructions: Machine Washable Sleeve Type: Long Sleeve Fit Type: Classic Fit About this product: "Important Note" Our L size is actually about the same as a Japanese S size. We recommend referring to the recommended weight listed on the product page when choosing your size. Size reference: M (Japan) XS, Height: 150-170cm, Weight: 40-47kg. L (Japan) S, Height: 160-175cm, Weight: 47-55kg. XL (Japan) M, Height: 165-178cm, Weight: 55-63kg. 2XL (Japan) L, Height: 168-180cm, Weight: 63-72kg. 3XL (Japan) 2L, Height: 170-185cm, Weight: 72-80kg. 4XL (Japan) 3L, Height: 175-190cm, Weight: 80-90kg. "Warm Material & Antibacterial and Odor-Resistant" Made with 8.3-ounce "Modal," this T-shirt is completely opaque, so you can wear it on its own! It can also be used as an inner layer under a jacket or hoodie in the cold season, providing excellent cold protection and comfort. Available in sets of 2 and 4, with a variety of colors and sizes to choose from, making it a great value. Very convenient for everyday wear. "Wear it alone or layered! Easy-to-wash 2 or 4 piece set" The unique design is particular about the silhouette, giving a slightly relaxed fit. Available in a variety of colors and sizes, it can be worn by anyone, from petite women to large men. Unisex, it can also be used for team hoodies and event hoodies. "High Stretch & Triple Stitching" Because it uses highly stretchable fibers, it allows for great freedom of movement and is comfortable to wear. It reduces the feeling of pressure when layering or wearing other items, so it's not at all uncomfortable. The cuffs and hem are triple-stitched, and reinforcement tape is inserted from the collar to the shoulders, making this thermal innerwear durable and long-lasting. You can use it for a long time! "Can be used in various places" This simple, plain innerwear can be easily matched with anything, from everyday wear to work clothes. It goes perfectly with any pants, from wide pants to skinny pants! It can be used widely for outings, commuting, school and work, travel, shopping, and exercise.