HOLLISTER 89602 CERARING™ CONVEX BARRIER RINGSItem No. 89602 CeraRing Convex barrier rings help prevent leakage and are infused with ceramide to protect the skin. They come in round and oval shapes, are flexible, and can be molded to fill in uneven skin contours around the stoma providing a secure, personalized, and comfortable skin barrier fit. The convex shape provides additional uniform pressure around the stoma to help prevent leakage and give you the security you need. Key Features Oval