Pack Racks are a soft inflatable roof rack system, engineered to transport SUP boards, boats, skis and long items of gear, yet pack down into a supplied 4 Liter packsack. The main air tube is made of high quality 420 D TPU-laminated nylon, with a daisy chain bartacked to the lower edge. The supplied orange-colored Ultra-Sil stuff sack has an integrated AirStream pump sack for easy inflation, and doubles as a caution flag for long loads. Attached webbing straps with cam buckles secure the Pack Racks inside the vehicle.