ConvaTec SUR-FIT Natura - Drainable 2-Piece Ostomy Bag w/Filter (One Sided Comfort Panel) makes an audible clicking noise to ensure that the flange and ostomy bag are connected. The two pieces snap together and apart, making bag changes quick and easy. It features a fabric-like comfort panel on the back side of the ostomy pouch that is soft against the skin and reduces pouch noise. The front of the pouch is transparent, allowing you to monitor stoma output. Its Invisiclose tail outlet makes it easy to drain and has a locking mechanism that secures the bag without the need for a clip. This ostomy pouch has an air filter that releases gas, preventing balooning.