Features:This car roof top storage bag is high-frequency voltage bonding instead of traditional sewing process, which features heavy duty waterproof, continuous sun exposure and wind, rain, sand resistance. It is great for outdoor traveling use.Installation instruction:Side rails - straps attach to side rails left-to-right.Cross bars - straps attach to bars front-to-back.Specifications:Material: PVCColour: BlackSize: approx. 112 x 43 x 86 cm/3.7 x 1.4 x 2.8 ftWeight: 2.5kg/5.5 lbPackage Size: approx. 39 x 30 x 14 cm/1.3 x 1 x 0.5 ftPoint:HEAVY DUTY MATERIAL - This Super Strong car roof top storage bag is high-frequency voltage bonding instead of traditional sewing process which is fully waterproof and weather resistance, ensures a lifetime of useTHE SECURE STRAPS - Car rooftop rack luggage carrier bag features thick, wide, sewn straps and exclusive clasps which will hold your items steady as a rock and gripped in place throughout your road trip.EXTREMELY LARGE 15 CUBIC FEET EXTRA STORAGE SPACE - Instead of squeezing all your things in the back or the backseats of your car, stop wasting your money on bulky cargo carrier boxes and time consuming to fit This vehicle roll up car roof bag only takes seconds to attach and provides extra space for your luggage.Package included:1 x Car top bagNote:- Please refer to the measurement. Tiny measuring error is allowable in normal range.- There might be a little color difference due to the monitor, camera or other factors, please refer to the physical item.