Simple white crew neck T-shirt, comfortable cotton material. - Brand: Jackman - Size: L - Color: White - Design: Crew neck - Material: Cotton Thank you for viewing. This item has been worn multiple times, but it is a used item, so we appreciate your understanding before purchasing. The following is a quote from the website: This is a ribbed T-shirt made from about 11.5-ounce extremely thick "Dotsume Tenjiku" material, which is made by knitting American cotton to its limit on a loopwheel knitting machine. We used ribs with the same thickness as sweatshirts, considering the compatibility with the body fabric, to balance the overall look. In addition to the peace of mind that comes from not being see-through, not showing the body's lines, and not easily showing sweat stains, the tightness of the ribs creates a voluminous half-sleeve sweatshirt-like form, and a gap is created between the fabric and the skin, making it comfortable to wear from spring to summer.