Hard to find fitted sheets for twin bed with pockets deep enough to stay on when bed is elevated frequently...these do the trick...loads of fabric, enough to tuck under the edge of mattress so even if it gets loose, it still stays under the mattress. This microfiber is strange...comes out of the washer and dryer with stains all over it...does anyone know why? This is the second set I've purchased and they both did the same thing...stained during the washing/drying...looks like baby oil or some other clear fluid...stains don't come out!