【Most Safe Design】: For security reasons, we use 6 reinforced adjustable straps to keep the cargo carrier in place. In addition, equipped with free anti-slip mat to keep the cargo bag stay in place even in high speed road or bump road, no slip, no scratch to your car. 【Large Storage Space】: Fivklemnz roof bag was designed to solve the problem of limited storage space in the car. 20 cubic feet rooftop cargo bag allows you to hold 6-8 suitcases, travel luggage case, tents, sleeping bags and more. Free up inside vehicle space for more comfortable on the way. 【Easy to Install】：It can be quickly and easily installed to roof rack in minutes whether your vehicle has a rack installed or not. Also , it is compatible with truck. 【100% Waterproof】: Made of 700D Oxford cloth, Fivklemnz roof bag adopts a genuine waterproof zipper, used in extreme weather and is protected with a double flap. All seams are heat welded and stitched to ensure they are watertight. 100% waterproof and rainproof under extreme weather. 【100% Refund or Replacement】：7x24 online customer support, ask us anything at any time. Backed by 30 days money-back guarantee and 12 months limited warranty.