Long sleeve under T-shirt and V neck with thermal winter napped fabric. It is not seen underneath outer garments. Thanks to its 100% combed cotton composition, all natural and breathable, it heats without retaining moisture, and is recommended for people with allergy or atopic skin problems. 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 adaptable fabric, that do not deform with the use. Anti-pilling fabric. Premium quality.