This is a set of 7 undershirts: 4 long-sleeved and 3 short-sleeved. The long-sleeved ones are used, and the short-sleeved ones were purchased from Nishimatsuya. The short-sleeved ones are described as being warm, but it's not very apparent from their appearance. Please be aware that they show signs of use. Also, any names written on the tags will be blacked out before shipping.