The SUR-FIT Natura® ostomy system is a comprehensive product line with ConvaTec's latest skin barrier technologies. The plastic coupling ring allows the pouch and skin barrier to snap together for audible security. Durahesive® skin barriers are designed for people whose stoma output is mostly liquid. Unlike other skin barriers that can breakdown around liquid output, Durahesive® skin barriers swell up or "Turtleneck" to further protect the stoma and peristomal skin. If the skin around your stoma is uneven from scars, crevices, or indentations, you can use ConvaTec's Stomahesive Paste 183910. Also, to provide added protection to the peristomal skin from output, you can try their Eakin Cohesive Seals 839002.