The Allegro Air Bag 8 inch or 12 inch is the most convenient ventilation system out there. It is an all-in-one system that is conveniently integrated with a carrying bag. Each end of the bag has a zipper to allow use of the blower without removal of the blower. The bag is made of highly durable reinforced polyester with openings for the plug and cord. Each blower includes a 15 feet ducting hose.