Sur-Fit Natura Moldable Technology Stomahesive Skin Barrier 1-1/4" to 1-3/4"The Natura system is a comprehensive product line with the latest skin barrier technologies. The plastic coupling ring allows the pouch and skin barrier to snap together for audible security. Durahesive and Stomahesive skin barriers are designed for people whose stoma output is mostly liquid. Unlike other skin barriers that can break down around liquid output, Durahesive skin barriers swell up or "Turtleneck" to better protect the stoma and peristomal