【Premium Waterproofness】- CORFICH rooftop cargo carrier bag is made of military grade superior heavy duty PVC and using seamless hot press technology , makes the bag much durable and waterproof than nylon oxford .Along with the heavy-duty waterproof zippers and 5-inch wide zipper cover for better protection your belongings against rain, grit, snow, wind and sun. 【Most Safe Design】- For security reasons, equipped with 8 reinforced adjustable straps and 4 door hooks to firmly keep bag mounted on all car with or without roof racks, heavy duty long straps with strong buckles keep the bag securely in place which prevent the bag from moving while driving even in high speed road or bump road, make it to be the safest and most secure cargo carrier. 【Roomy Cargo Capacity】 - The roof bag overall size is 44"Lx 34''"W x 17''"H, 15 cubic feet cargo storage space in total 425 liter capacity, it can accommodate everything you want without impeding on passenger comfort, ,maximize the inside vehicle space for more comfortable on the way, profect solve the problem of limited storage space in the car. 【Easy to Use & Storage】 - Corfich rooftop cargo carrier fits for various vehicles such as the cars, vans, or SUV. It can be quickly and easily installed in any car with a cross bars, side rails, basket or without rack .. folds compact for easy storage, easy to fold up into the free storage bag when not in use. 【Bonus Lock】- Equipped with bonus combination lock prevents the zippers from slipping open, 3 Digit luggage combination locks offering you a better and safer solution for storage your car top luggage when traveling.