There are no stains or blemishes. MUJI Kids' Shirt The fabric is linen. I have a size 120 as well, as my children wore these as matching outfits. The hot days continue. Because it's linen, it's breathable even if you sweat, so you can wear it cool and comfortably♪ Because it's a light color, it's easy to coordinate with parent-child link outfits!!