LARGE STORAGE SPACE - Designed to solve the problem of limited storage space in your car. With a 20 cubic feet capacity (51" x 39" x 17" / 130cm x 99cm x 43cm), Sailnovo roof rack cargo carrier easily holds luggage for around 6-8 people, freeing up space inside your vehicle for a more comfortable trip.For compact cars, we recommend our 15 cubic feet model, while SUVs and larger vehicles can opt for the 20 cubic feet version. WATERPROOF & TEAR-RESISTANT - Sailnovo soft rooftop cargo bag is crafted from ultra-durable Oxford fabric and reinforced with a triple-layer military-grade 1000D PVC waterproof lining. Premium materials and innovative technology ensure your belongings remain dry and protected. Note: Avoid placing sharp objects directly in the bag to prevent tearing during vehicle movement. Waterproofing performance may be compromised under extreme weather conditions. SECURE INSTALLATION & DESIGN - Designed with an extended waterproof flap and reinforced sealing strips for superior protection against wind, dust, rain, and snow. For safe installation: secure all excess straps to prevent flapping, check stability before each use by gently pulling the bag. Important: Your car roof should be at least 58" long and 42" wide (147cm x 107cm). Note: This is a soft-shell rooftop cargo bag, not a hard-shell carrier, which allows for convenient folding when not in use. WIDE COMPATIBILITY & WEIGHT LIMITS - Equipped with 6 sewn-in reinforced straps, 6 heavy-duty door hooks and 2 extra adjustable straps, fits most cars and SUVs with or without roof racks. Not suitable for vehicles with sliding doors, 2-door cars, panoramic roofs, or non-removable door seals. Never exceed your vehicle's official roof weight capacity - check your owner's manual for exact limits. AERODYNAMIC DESIGN - Features streamlined construction that reduces wind resistance and road noise during highway driving, maintaining stability at high speeds for a quieter, more comfortable driving experience. LARGE STORAGE SPACE - Designed to solve the problem of limited storage space in your car. With a 20 cubic feet capacity (51" x 39" x 17"), Sailnovo cargo rooftop carrier easily holds luggage for around 6-8 people, freeing up space inside your vehicle for a more comfortable trip. WATERPROOF & TEAR-RESISTANT - The Sailnovo car roof storage is crafted from ultra-durable Oxford fabric and reinforced with a triple-layer military-grade 1000D PVC waterproof lining. Premium materials and innovative technology ensure your belongings remain dry and protected. SECURE & CONVENIENT DESIGN - Designed with an extended waterproof flap and reinforced sealing strips, the rooftop carrier offers superior protection for your belongings against wind, dust, rain, and snow. When not in use, the rooftop cargo bag folds compactly into the included storage bag. UNIVERSAL COMPATIBILITY - Equipped with 6 sewn-in reinforced straps, 6 heavy-duty door hooks and 2 extra adjustable straps, Sailnovo cargo carrier bag fit any car, with or without a roof rack, ensuring you can benefit from extra storage from roof bag space regardless of your vehicle type.