WeatherTech RackSack Rooftop Cargo Carrier is designed to expand your cargo carrying capacity by up to 13 cubic feet. If you need more space for your equipment, big mountain shoes or camping gear this carrier will take care of it! It is made from a 1800-denier woven polyester fabric material using a water-repellant treatment and will resist even the most extreme weather conditions. WeatherTech RackSack Rooftop Cargo Carriers are available with a soft fleece pad lining on the underside to ensure your gear is kept safe and your factory paint remains untouched. They will fit your roof rails securely with the special 11/2"-wide webbed straps. When not in use, you can place it in your trunk or rear cargo area and simply open it the next time you need to transport an extra load. The carriers come with a 3-year warranty against defects in materials and workmanship.