Long sleeved T-shirt with three-layer thermal fabric. The fabric is formed by three parallel layers that create a film of air between the skin and the garment, which maintains body heat without retaining moisture. For those who want to go warm and in a thin T-shirt. It has no seams, so it does not rub the skin anywhere and the endings are all extra-flat and resistant. In addition the neck and cuffs are made of a special fabric, that do not deform with the use. Anti-pilling fabric. Premium quality.