Two-piece medical device designed for patients with anus contranatura pouches. It contains a pouch with a flat and flexible cuttable skin barrier, with peristomal skin protective action, adaptable to different types of abdomen. With a closure that prevents the migration of effluents from the stomas to the skin. With a ring of 70 millimeters. Made with sodium carboxymethylcellulose, pectin and gelatin. It has a hypoallergenic adhesive support on the periphery.