✅【SAFETY COMES FIRST WITH 10 ADJUSTABLE STRAPS】- For security reasons, we use 10 widened 1.46-inch reinforced adjustable straps and strong buckles ensure the stability, and keep the cargo carrier stay in place even in high speed roads, rugged or muddy roads, no slip, no scratch. To Some Extent, The More Straps Used To Fasten The Carrier To The Roof The Better. SIMNIAM Car Roof Bag Give You A Safer Travel! ✅【19 CUBIC FEET SUPER LARGE CAPACITY】- The Car Roof Bag Overall Size Is 48.03" L *44.88" W *18.11" H, 19 cubic feet car rooftop bag allows you to hold approximately 4 suitcases, tents, sleeping bags and more. You can bring everything you want without impeding on passenger comfort, larger capacity, more pleasure! ✅【100% WATERPROOF DESIGN】- Features triple-layer high density 700D PVC anti-tear fabric, which is 1.5 times stronger than 500D PVC fabric. Simniam car roof bag adopts a upgraded waterproof double zipper with a zipper flap(length 138inch&width 4.72inch), which can can provide maximum protection in extreme weather. All seams are heat welded and stitched to effectively protect your luggage against rain, grit, snow, wind and sun on the road. ✅【SUITABLE FOR VEHICLES WITH ROOF RACKS】- Simniam car roof bag is suitable for most vehicles with rack, including cars, mini vans and SUVs. The installation is very simple and can be installed on your roof rack in a few minutes. The folded volume is small, easy to carry and store, and comes with a carrying bag. ✅【WARM ATTENTION】- ►NOTE 1: The zipper of the car roof bag belongs to the TPU waterproof zipper. Compared with the ordinary non-waterproof zipper, the waterproof zipper is not so easy to pull. This is a normal phenomenon and is not a quality problem, please pull it slowly during use. ►NOTE 2: Our roof bag does not have anti-skid pads and hooks. ►NOTE 3: If you meet installation problems or product quality problems, please contact us immediately, we will solve it for you as soon as possible!