SUR-FIT Natura is a line of 2-piece ostomy bags and flanges from ConvaTec. One feature of these products is that the ostomy pouch and wafer make an audible click noise to indicate that they are securely attached to one another. They are designed to easily snap together and snap apart when changing your pouch. SUR-FIT Natura skin barriers also feature a moldable material in the center that can be shaped around your stoma to prevent output from seeping underneath the wafer or coming into contact with your stoma. This also eliminates the need to cut an opening in your wafer.