Natura Two-Piece Closed-End Pouch. Natura Closed-End Pouches are designed for one-time usage. They are available with a filter that is designed to reduce odor and gas buildup. There's no draining or uncomfortable clip to worry about. When you're ready, you simply remove the pouch, place it into a disposable bag, then discard it. Compatible with Stomahesive and Durahesive skin barriers.