Sur-Fit Natura 2-Piece Drainable Pouch Mold-to-Fit, 2-1/4″ Flange, 12″ L, Opaque, Box of 20. Natura 2-Piece Drainable Pouch. The drainable pouches have soft, fabric-like comfort panels. A simple snap-off, snap on design allows users to change the pouch quickly to match activities without removing the skin barrier from the skin.