Improves efficiency and safety: The bag is designed to minimize air resistance and reduce fuel consumption when carried on a car roof, helping you transport luggage safely and with better overall efficiency. 420D waterproof cargo bag for roof use: Universal Luggage Bag Storage Cube Bag for travel and camping, designed to function as a convenient roof cargo carrier and storage box. Durable and longlasting construction: Made from 600D Oxford fabric, the bag is waterproof and tearproof, providing reliable performance and longevity for regular travel and outdoor use. Broad compatibility: Widely applicable for vehicles with roof rack side rails, crossbars, or cargo baskets, and usable even without racks. A versatile choice for travel and camping needs. Versatile storage solution: A practical universal storage cube bag that can accommodate clothing, gear, and other travel essentials, helping you organize cargo on trips. Use scenarios: Family road trips requiring extra luggage space on the roof, while keeping items protected from rain. Camping trips that need additional gear such as tents, sleeping bags, and tools stored securely. Weekend getaways or spontaneous trips where extra storage is needed and mounting options vary (with or without roof racks).