The 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. People living with a urostomy have unique needs, which is why ConvaTec offers a pouch product line especially for them. Unit dose kits contain one barrier and one pouch. Available with standard wear skin barrier and drainable pouch or with extended wear skin barrier and a urostomy pouch.