Cargo Fly (Alpacka)

Also: Cargo Fly zipper

Cargo Fly is Alpacka's name for the airtight zipper used to stow luggage inside the tube.

The principle is the same as MRS's ISS. According to Alpacka's repair guide, a small separation behind the slider often closes by itself; gaps at the end are cleaned, pressed shut by hand and the slider is reset.