- WATERPROOF: Constructed from high-quality 840D PVC tarpaulin, this roof bag features a grid material and high-frequency voltage technology, providing a durable and heavy-duty solution for transporting your gear. - EASY TO USE: The bag includes an anti-slip mat, a luggage lock, six security hooks, and a convenient storage bag. Set up takes only minutes, and the soft shell material allows for easy folding into the storage bag for compact storage when not in use. - UNIVERSAL COMPATIBILITY: Designed to fit any car or SUV, this roof bag can be used with or without a roof rack, making it a versatile addition to any vehicle. - SECURITY: A bonus combination lock is included to prevent zippers from slipping and to enhance the security of your luggage during travel. - LARGE STORAGE CAPACITY: With an impressive 21 cubic feet of storage space (dimensions: 52 inches length x 40 inches width x 18 inches height), this rooftop cargo bag easily accommodates 4 to 6 suitcases, travel luggage, tents, sleeping bags, and more. Use Scenarios: 1. Perfect for family road trips where extra luggage is needed, ensuring all items are securely stored on the roof. 2. Ideal for camping adventures, providing ample space for tents, sleeping bags, and other gear without sacrificing interior space. 3. Great for moving or transporting bulky items when relocating or going to university, providing an efficient solution to maximize storage. This rooftop cargo bag combines practicality with robust design, ensuring your belongings are secure and protected while on the road.