UNIQLO Heattech Undershirts / Innerwear Long Sleeve 100cm Black x 2, White x 2, Total 4-piece set These are cotton type, not the standard thin synthetic fiber type. The product tag is attached to the outer fabric. They show signs of wear, but are still usable. The white ones have some discoloration due to being washed with colored items. There are individual differences in how the condition of the items is perceived, so please understand that these are used children's items.