Brava Mouldable ring A mouldable ring is used to create a tight seal between the stoma and the appliance, thereby protecting the skin against stoma output. The Brava Mouldable Ring features a strengthened formulation that delivers longer-lasting protection against leakage, because it is designed to be the most durable ring enabling it to maintain a tighter fit. It is easy to use can be moulded to fit your body shape.