ConvaTec SUR-FIT® Natura® Two-Piece Drainable Pouch with One-Sided Comfort Panel and Tail Clip 2-1/4" Flange, 12" L, Opaque, Moldable Technology™ Skin Barriers 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. Only the SUR-FIT® Natura® ostomy system is available with ConvaTec Moldable Technology™ skin barriers. These barriers hug the individual contours of your stoma to allow for a secure, personalized fit without the need for scissors. Pouch allows for draining. Coupling ring provides audible click confirming secure connection to skin barrier. Comfort panels are designed to be quiet and odor-proof helping maintain discretion. Two-piece design permits easy pouch removal for venting or changing.