ConvaTec SUR-FIT® Natura® Stomahesive® Cut-to-Fit Wafer without Tape Collar 4" x 4" 2-1/4" Flange, Two-Piece BarrierThe SUR-FIT® Natura® Ostomy System is a comprehensive product line with our latest skin barrier technologies. the plastic coupling ring allows the pouch and skin barrier to snap together for audible security. Stomahesive® skin barriers are ideal for people whose stoma output is semi-formed to formed. This reliable skin barrier provides a unique formula that enables the skin barrier to adhere to both dry and moist skin. It is gentle on skin yet holds firmly.Skin barriers recommended stoma output is semi formed to formed. It holds securely to skin while helping to protect against irritating output.Coupling ring provides audible click confirming secure connection to skin barrier.