The Handirack inflates and installs in mere minutes! We were skeptical when we heard about these, but once we tried them we became believers. This unique inflatable roof rack system can be installed in minutes without tools and is rated for loads up to 180 pounds. They work with canoes and kayaks or most other items you'd carry on metal roof racks. Best of all, when not in use, the Handirack just deflates and stores in its own compact case in your trunk. Heavy duty nylon laminated PVC with D-rings for tying down your load. The two units strap through car doors and onto roof and inflate with the double-action hand pump. Just tie down load to rings and bumpers and away you go. Works best with four door vehicles.