Natura® Closed-End Pouches (Compatible with Natura® Skin Barriers) Natura® Closed-End pouches are designed for one-time usage, and may be used everyday, for special occasions or intimate moments. They are also available with a filter that is designed to reduce odor and gas buildup. There is no draining or uncomfortable clip to worry about. When you are ready, you simply remove the pouch, place it into a disposable bag, then discard it.