This is a set of two long-sleeved T-shirts purchased at Birthday. They are a Monchhichi collaboration and a milk design, both size 100, and the material is 100% cotton. The milk long-sleeved T-shirt has a small stain (see image), but I think they are in good condition overall as they have only been worn twice each. There is a slight stickiness remaining on the tag on the left waist due to a name sticker. Please be aware of this before purchasing. *These items are not sold separately.