| Customer Reviews: Average Rating:  Rating : - Sturdy and Waterproof I adjusted the cross-bars on the factory-installed roof-rack of our Toyota Sienna mini-van, put the KarPak between the bars, and packed it with clothes and snow-pants for six people. At that point, it was only half full. I strapped it down and tied off the loose strap ends. The entire procedure took twenty minutes, including reading the instructions. We set off in a cold rain storm. If we concentrated, we could hear the wind rushing around the bag at 70 mph, but there was no flapping of the plastic or the straps at all. Half-way there I opened the pack to get something out. I forgot to zip it up again and kept diving for another hour in the rain. But the plastic of the KarPak is sturdy and thick. There is a generous flap over the zipper. Even with the zipper undone and driving 70 miles an hour, hardly any water penetrated. With the zipper done up, we find it to be entirely water-proof. The zippers worked fine at 28F with the bag covered with snow. There are two zippers, and we found we could lock the bag by passing the bar of a standard combination lock through the zipper pulls. To get into the bag when it's locked like that, you would need a sharp knife and a strong arm. Maybe we would not leave the bag outside on the car with valuables inside on an inner-city street, but in a car-park in daylight we were perfectly content to leave it. For our trip of 380 miles in brisk cross-winds, we used roughly 20 gallons of gas, for 19 mpg with the KarPak's added resistance on the roof. That's pretty much the same as we get without the KarPak. Maybe we can get 22 mpg on a calm day on a flat highway. All round: we are delighted with the KarPak, and recommend it without reservation. + See Full Customer Review |  |