CURT 18221 Extended Roof Rack Cargo Bag Keeps cargo protected from water, dirt, wind damage and more Fits into CURT roof rack cargo carrier #18115 with extension #18117 Made from thick, 500 x 500-denier, UV-resistant vinyl. Features welded seams to be truly waterproof Zip closure with hook-and-loop flap keeps inside completely dry Zippers feature large holes to accept a padlock. Tiedown straps securely attach to cargo carrier frame