COSTWAY 15/21 Cubic Feet Car Roof Bag, 100% Waterproof Roofing Cargo Carrier with Anti-Slip Mat, Combination Lock & Straps, Rooftop Luggage Storage Box (Black+Orange, 15 Cubic Ft/424L)

For the product to work properly on a car which has no rails , we need 8 straps. The product promises 6 straps but the actual delivery is of 4 straps.We don’t have option to buy extra straps anywhere. You will have to use additional ropes to make it work which makes it look very ugly.

This is an excellent product. I used it on a roof rack. Most cars will take up to 75Kg on the roof (including rack). This bag will have no problems with that. No ingress of water despite heavy rain over a seven day period. Fixings are strong and plentiful. The fact that it pulls down to the height of the contents so that it always maintains the lowest possible profile helps with efficiency. I detected no wind noise.I have not used it without the roof rack so cannot comment on that, but is made using the rack really secure, rain proof and easy.

Going to write a pretty long review as was very dubious about buying this roof bag and hope it helps someone else. When buying this roof bag, consider how many times you will be using it a year as using once/twice a year is fine but I personally don't think I would be happy using this lots. If you are practical then this roof bag should present no problems fitting and securing, if you're not then go to Halfords, buy and get them to fit roof bars and top box to your car. When packing, place your bedding, towels etc on the bottom covering the whole of the roof bag to protect your roof. Easy to secure with only having to use the 6 straps provided and stayed in place upto speeds of 90 mph (on the Autobahns) so no worries there at all. Didn't have to retighten straps as made sure it was fully loaded but may shift if not packed properly. When it comes to waterproof, we drove through two yellow warnings for rain and it was constant both there and back and absolutely no leaks at all, clothes, food, bedding and towels all dry. We were going to hire roof bars and top box but down to cost this beats it hands down. To sum up, cheaper than hiring a top box, no worries about storing a bulky top box in the garage as folds down very small and can be stored in a cupboard, definitely waterproof, good value for money. Would recommend

As a family of 4 loading up the car for trips away can be rather stressful. We debated buying a roof box, but didn’t have rails on the car and couldn’t believe the cost. We came across this and thought we’d give it a go. I’m so glad we did. It’s so good, easy to fit and you can get so much in it. It’s really sturdy, even at speed and with it full of suitcases! We don’t have to worry about whether we can pack everything now and although we’d originally brought it for a camping trip we use it all the time now. This is a completely honest review.

Easy to instal and in-instal. Very convenient to store extra luggage.

I was very sceptical in purchasing this item as, I didn't think it would be safe and hold much. But wow this exceeded all my expectations. it is made of good quality material. It holds more than what I expected. It made our holiday journey so much nice and relaxed, with not having the car fully loaded and cramped. Would recommend the product to family and friends.