Convatec, Filtered Ostomy Pouch 2-1/4 Inch, Box Of 5Product Description The SUR FIT Natura Flange System signals a secure, accurate closure with a series of audible clicks%XE2%X80?. 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 The High Output pouches come with a removable filter that reduces pouch ballooning and neutralizes odor, an anti reflux valve that decreases liquid output backflow, and an outlet