The Premier Urostomy Pouch's built-in convexity means added security and skin protection for recessed, retracted and flush stomas... cut-to-fit openings. The Flextend skin barrier is the barrier of choice for urostomies and ileostomies. It protects the skin over extended wearing time from irritating discharge. Your security and confidence is assured with the internal non-reflux valves and a drain valve that allows regulation of flow rate.