Rooftop bag.com made of polyester canvas. Dimensions approximately. 50x42 depth 12inches. 

Rubber pad included

The 100% waterproof Cross Country car top carrier offers the best weather protection and durability in the market. This car top carrier features electrically sealed joints, waterproof fabric, waterproof zipper, zipper flap, water-repellent straps and no exposed stitching. It is made to withstand the most severe weather conditions and rough handling and still protect your belongings for many years.

Straps:

Straps are unique in the market: heavy-duty, seat-belt type, 1.5 inches wide, 1,000-pounds strong. They are water-repellent to avoid water wicking into the car. Each strap includes two genuine YKK, super-tough delrin side-release buckles. They provide easy access to the roof top carrier's contents from either side of the carrier.

Versatile Design:

RoofBag rooftop carriers are made to work with naked roof tops, cross bars, side rails and can also be installed on cars with sunroof.