I bought this cute, ruffly diaper cover/bloomers for my daughter to wear underneath her first birthday tu tu.  They were a little thinner than I had expected and not quite as stretchy as I had expected either.  They were a little stiff to pull up and on over her diaper, and didn't totally stay up, kind of slipped down a bit.  They look so cute with the ruffles on the behind, though, and the look was just what I wanted.