Features:

• Bag size is 39" x 32" x 18"
• Attaches to factory or aftermarket roof racks with quick attach web straps and requires no drilling for a quick and easy installation
• Made of water repellent nylon and polyester with full length 2-way zippers allowing for easy access to cargo
• Fold neatly away for storage when not in use
• Lightweight, large capacity design stores up to 13 cubic feet for added cargo space

Editor Reviews:

Product Description:
A great travel tool. The Lund Soft Pack Roof Top Carrier Bag is a light weight, large capacity carrier that holds up to 13 cubic feet of cargo. Easily installs with quick attach web straps and always comes in handy. Affordable cargo management. Soft car top carrier dimensions: 39" x 32" x 18". Soft pack roof top carrier has a weather resistant design is constructed of water repellent nylon and polyester. Storage bag has full length 2-way zippers allows for easy access and loading from sides or back. Plus it neatly folds away when not in use.

Rating : - Great Value
I purchased this bag from Amazon for less than 30 bucks with free shipping. It was simple to use with my existing roof rack. The box included door jamb hooks that could be placed onto the straps facilitating use on vehicles without roof racks. I can't speak about it's water tightness (no precip on my trip) but it rode all the way from Florida to Ohio with no problems. I had 3 plastic storage bins with lids in this bag (just in case I had to empty the bag at the overnight hotel, which I didn't) and it filled it out pretty nicely.

The added space on this one trip paid for the bag and it worked great!