Are the sides of the Duffle Bags rigid? Do they hold the shape?
ThThe Duffle Bags are meant to be light-weight and take a small volume. They do not have rigid walls and can be folded flat when they are empty. However, when filled, the Duffle Bags are shaped higher at the rear and lower at the front, to conform to the aerodynamic shape of the RoofBag carrier. When you fill the Duffle Bags, place more items toward the rear, in order to maintain this aerodynamic shape.