Premier One-Piece Drainable Ostomy Pouch Convex Flextend Barrier, Lock 'n Roll Closure, Tape. A one-piece, drainable pouching system designed to be opened at the bottom when emptying. These pouches are most suitable for colostomies or ileostomies. The Flextend barrier is an extended wear skin barrier that is durable and offers high resistance to erosion. The integrated Lock 'n Roll closure uses plastic interlocking fasteners to create a secure closure at the bottom of the pouch. Soft, beige ComfortWear pouch panels help provide comfort. Features: Flextend skin barrier, convex, Tape border, Cut-to-fit and pre-sized skin barriers, Transparent and beige odour-barrier pouch film options, Lock ̴Ìàn Roll closure, Not made with natural rubber latex.