The Range Jr Car Top Carrier is weatherproof and attaches to vehicles WITH or WITHOUT a roof rack. Attach the carrier's straps to a vehicle’s roof rack or use the Car Clips to attach the straps to a vehicle's door frame weather molding. The carrier is made from UV protected PVC Semi-Coated Mesh XT for maximum durability. Use the Range Carrier on your next family vacation, backwoods expedition, shopping spree, or move.