ConvaTec SUR-FIT Natura - 12" Drainable 2-Piece Ostomy Pouch w/Filter (InvisiClose Tail) evenly distributes the contents away from the stoma while being both quiet and odor proof. The charcoal filter helps deodorize and release gases while the InvisiClose tail offers security, convenience, and easy draining. All pouches feature a one sided comfort panel except for the Opaque pouches. They come with two comfort side panels. In addition, the only pouch that comes with a flange size of 1 1/2" is the opaque filtered pouch. Transparent: Box of 10. Opaque: Box of 20.