※Shipping unavailable from December 29th to January 6th※ This is an Under Armour long-sleeved undershirt, crew neck, size SM. It's a bit thick and has a fleece-like lining. As it's getting colder, how about using it as a winter undershirt? I don't think I've worn it much, but it's a used item, so please refrain from purchasing if you are looking for something in new condition.