Ostoform FLOWASSIST Closed Pouch.This item forms one half of a 2-piece pouching system. The FLOWASSIST Closed Pouch is made from Polyethylene Fleece, a fast-drying material that prevents electrostatic build-up, and includes an activated carbon filter that deodorizes gases and allows them to escape unobstructed. It features a set-in window and an integrated coupling system for attachment to the baseplate by pressing the two plastic click rings around the floating flange.