Maven Gifts: Rightline Gear Sport 3 Car Top Carrier and Non-Skid Roof Pad with Clips Car Top Carrier Capacity: 18 cubic feet; dimensions: 48 inch length x 40 inch width x 14-19 inch height. 100 percent waterproof with dual seam technology; sewn for strength/welded waterproof. Includes: carrier, 4 nylon straps, stuff sack, and a sewn-in set up guide, 4 car clips and non-skid roof pad. The clips attach under the vehicle's door frame weather molding. Roof Pad protects roof from sharp edged objects inside bags.