SportRack A21106B Sherpa 13 Roof Bag 13 cu. ft. (368 liter) capacity Durable, water-resistant PVC coated nylon construction helps keep belongings dry Mounts directly to most OEM and aftermarket crossbars with included heavy-duty buckles and nylon strapping Oversized rain flap with hool and loop closure helps protect heavy-duty zipper from weather Dimensions: 35"(l) x 35"(w) x 18"(h) / 4.5 lbs (2 kg)