I've worn these a few times, but as far as I can tell, there are no stains. Both are made of 100% cotton, so they're a safe material. This is a great deal for a set of two. Baby Doll and F.O. Kids are a great value at 700 yen each. I dressed my son in these, but I think they would also look good on a girl. They'd be cute with a skirt! Because he gets hot easily, he often wore a shirt over a tank top. He would take the shirt off quickly though. #NurserySchool #Kindergarten #Summer #TShirt #Travel #Beach #Camping #Tops #Running #Bundle #Unisex #CommeCa #BabyDoll