WHY CHOOSE Sailnovo ROOF CARRIER? Waterproof Car Roof Carrier -waterproof, with covers the zipper in heavy rain, offers the best weather protection.Security & Safe - This Top Cargo Bag with 6 x tough wide door hooks and 2 x long straps ( 3 M ) to ensure that everything stays in place. Compact and Easy to Store - When it isn’t in use, compact design allows you to fold and store it anywhere. Bring Everything you Want Designed to fit all roof racks such as cars, vans, and SUVs. The heavy-duty construction will protect your belongings from exposure.Go Far, Do Anything - The compacity of our waterproof rooftop cargo bag is 20 cubic feet, Ideal for on-the-go families, adventure-seekers, or anyone just looking for some additional space while traveling. Velcro Flap over the Zipper: Provides double security to the cargoWaterproof Zipper: Made of high-quality zipper, sealed and easy to use.Reinforced Straps: Secure, even without a roof rack or crossbars. Our Car Rooftop Bag is produced for maximum safety with 8 reinforced straps and 6 door hooks.Extra Large Size: Unlike other bags that only offer 20 cubic feet of storage, the Sailnovo Roof Bag's massive 20 cubic feet of space can easily hold 5-6 suitcases, making our Rooftop Cargo Carrier the perfect choice for every family trip.Waterproof/Tear/Heat/Cold Resistant - Can be used under extreme weather. Our advantage High-Density 1000D PVC Made of high-density 1000D PVC fabric, Vetoos rooftop cargo bag is waterproof with Triple-Seal technology for maximum protection in extreme weather. Storage Bag The easy-to-carry storage bag can be placed on the roof of the car when in use, and can be folded and placed in the trunk when not in use, so it does not take up any space. 8 Reinforced Straps For security reasons, we use 8 reinforced adjustable straps to keep the cargo carrier in place. In addition, equipped with a free anti-slip mat to keep the cargo bag stay in place even in the high-speed road or bump road, no-slip, no scratch to your car. Waterproof Car Roof Carrier 100% waterproof, with covers the zipper in heavy rain, offers the best weather protection. Compact and Easy to Store When it isn’t in use, compact design allows you to fold and store it anywhere. Bring Everything you Want Designed to fit all roof racks such as cars, vans, SUVs. The heavy-duty construction will protect your belongings from exposure. Go Far, Do Anything The compacity of our waterproof rooftop cargo bag is 20 cubic feet, Ideal for on-the-go families, adventure-seekers, or anyone just looking for some additional space while traveling. Don't worry rough and bumpy road Wide straps can ensure everything stays in place even on a rough and bumpy road, enjoy a comfortable and pleasant trip. INSTALLATION WITH/WITHOUT RACK: Install and Tightly Secure the Sailnovo Roof Top Cargo Carrier in Just a Few Minutes: Step 1 Open your door and carefully pull back the weatherstripping seal. Step 2 With the seal pulled back, place one of the 4 included door hooks on the metal doorframe. Step 3 Applying gentle force, pop the weatherstripping seal back into place with your hand and close the door. Step 4 Apply the same procedure to the other doors. These hooks will safely anchor the rooftop cargo bag.