Black baby undershirt made of UNIQLO's HEATTECH material, providing excellent heat retention. - Brand: UNIQLO - Model Name: HEATTECH - Size: 80 - Color: Black - Material: Polyester I purchased this, but only wore it twice because the daycare my child started attending didn't allow long-sleeved undershirts. However, after washing, I stored it in a clothing case with other undershirts for a while, so please understand that it has been stored at home before purchasing. Thank you for looking.