Waxed Canvas Flight Bag The Aviator&&';;s Kit Bag is used on all Airborne flight operations (jumping out of planes or helos). Special Forces and other units started using the Aviator&&';;s Kit Bags as travel bags, pilot flight bags, and deployment bags because of the large opening at the top, which is plenty big enough to comfortably allow body armor to fit inside. Our 32L Kit Bags are inspired by classic aviator&';s kit bags, which are also used by Special Forces teams to transport a small army&&';;s worth of gear (per person). We&';ve modernized the aviator&';s kit bag and added functionality not for jumping out of airplanes, but for daily use, travel, and storage. For Specs + Materials, we chose the strongest possible duck canvas with a waxing process proven over the last 170 years, giving the Kit Bag a retro canvas look with the durability you&';d expect.