For about $10. Total genius. And slick! Someone suggested putting a light inside of it for a Chinese lantern look. I saw a wooden-shelled cargo bike at the Oregon Manifest that had Velcro material inside the ‘hull.’ The guy said it damped (not ‘dampened’) the rattling of cargo, and also, stuff stuck to it, like tool rolls! Sounded good to me. It would probably triple (“TRIPLE!”) the cost of the bag.