This is a long-sleeved Under Armour shirt made of mesh material. I mainly used it as an undershirt. I'm selling it because I realized I wasn't using it during the seasonal change! Even though it's long-sleeved, it's a 3/4 sleeve length, which I personally found appealing when I bought it. The size isn't written on the shirt itself. I think it was either S or M. My height and weight when I wore it were: Height: 171 cm. Weight: 55 kg - 60 kg - Brand: Under Armour - Color: Black #UnderArmour #UNDER ARMOUR #sports #sports equipment #gym #gym equipment #sports gym equipment #innerwear #baseball #soccer #basketball #volleyball #fashion #stylish #outdoor #fashionable #muscle training #muscle training equipment #clothes