100% WATERPROOF – The car top luggage carrier bags are made of heavy PVC fabric + waterproof coating to ensure no surface leakage. 5 “wide zip cover + 5long Velcro cover the zipper completely and keep it close to the zipper. Finally double coat the zipper with a waterproof coating. It can do 100% to prevent water from entering the bag 20 CUBIC FEET – 52″L x 38″W x 18″H Extra-large size saves you more interior space. Included a storage bag fold the soft roof luggag bag into a storage bag when not in use SAFETY ACCESSORIES INCLUDED – The roof protection pad prevents the bag from sliding during driving and protects the roof paint. The TSA combination lock will ensure that your luggage is safe during the journey FUEL CONSUMPTION REDUCE – This rooftop cargo carrier is aerodynamic design that significantly reduces wind resistance and thus saves on fuel costs.It also reduces the risk of being torn by the wind and improves durability International products have separate terms are sold from abroad and may differ from local products including fit age ratings and language of product labeling or instructions.