Amazon BasicsRooftop Cargo Carrier Bag, Black, 424.8 litres, 15 cu. ft.

This carrier bag held a king size duvet, lots of pillows, a small suitcase and another bag.We forgot it was on the roof and was it able to deal with motorways without moving, although we did use an anti slip mat just in case.No leaks, and it poured down with rain on the way back from our trip.Having downsized, we don’t have much storage space at home, so this is brilliant for anyone in the same predicament.As for security, personally would not leave unattended with stuff inside. A lock might work, but there would be other ways to get inside the material if one was determined!I recommend this product and hope it lasts a long time.

Unfortunately the bag was too big for our small car's roof rack, however, as other reviews have said, it's a seriously good bag for the money. I have returned it, but only because it was too big, and have opted for individual Dry Bags instead. I think the best review photo I saw was from someone who is using it in the back of a pick-up truck. It's most definitely excellent value for money, and for a certain purpose, it was just unfortunate that it wasn't going to work for my particular situation. I would however, not hesitate in buying the bag again for a different application. The double opening zipper was, as reported by others, easy to use and of good sturdy quality, with a weather flap that velcros over the zip for added waterproofness. As noted by another reviewer, you do need to make sure that the area where the two zippers meet is facing backwards if it's on a car roof, to further ensure that no prevailing water coming towards your vehicle sneaks in between the two ends of the closed zip, despite the weather flap's existence. Really, it's an excellent bag. The Amazon branding, by the way, points forwards and backwards, that is how you know which way around it goes on your roof. Also, it refolds easily and the storage bag, which is made from the same material, is nicely over-sized so getting the roof bag back into its 'holdall' is easy too.

It’s a really inexpensive way of getting that extra luggage space when travelling. My partner and I, with 2 nieces, a nephew and dog loaded up the Ford Kuga for a weekend caravan holiday.It has masses of space, which is a bit of a downfall as it means that it can move around a lot and can’t strap it down as well. I only used the side bars on the Kuga, but I guess a set of Thule crossbars would help this. There is also an anti slip mat that can be purchased but I don’t know how well this would stop it from slipping. The fuller the bag, the more it will stay firm and in shape.The straps are strong - just make sure you tighten these as they will flap about.Also it is extremely waterproof. I went through an absolute monsoon. It was a typical Scottish adventure - 4 seasons in one day. The contents stayed dry. There was a slight bit of dampness on the front of my holdall which was pushed to the very front of the bag so would have got the force of the elements from being at the front. Luckily this was on the way home, but I don’t think my clothes would have been too bad if it were on the way there.I would recommend that you use an anti slip mat or crossbars to keep this secure. It comes with a nice waterproof carry case, we packed this with some stuff too. I would also recommend that you have a waterproof hold-all or backpacks to load it with.

Arrived as described -works quite well. Took a bit of time to fit and load the 1st time - the buckles needed to be adjusted to length for my vehicle - wrapping the straps around the bars helped - good bit quicker the 2nd time. Good for a single long drive when you will be unloading at your destination. Not really suitable for touring where you need the contents every evening. Good solution for our once a year need for additional luggage carrying capacity to give the dog space in the boot / trunk. Much more cost effective than bars and a solid roof box and much easier to store when not in use. Best used with soft walled luggage as they can be squeezed in. Once filled and with all straps tightened and ends folded in was really secure on the roof between the longitudinal running bars (golf estate with stand off bars). Was water tight at 70mph on the A9 this week during heavy rain - be careful to install with zips to side and rear and use the velcro flaps to cover zips. I paired it with a non-slip mesh mat - to protect car roof and minimise possibility of slipping. All in all good value for what it is and met my expectations.

Had a ‘boot bag’ for an MX5 a few years ago and it leaked like a sieve, so I was sceptical to say the least; but this roof bag is brilliant! Setting up the first time was a bit difficult adjusting the straps, but once that’s done it’s straight forward and I managed it myself (I’m 5’6” and have an MPV). Really capacious, durable, totally water proof and folds into its own storage bag when not in use. Forgot it was on there when I was driving. Highly recommended.

Really liked that it was waterproof, sturdy, with ample room. Disliked that it was a real faff to position on top of the roof rack and had to use support structures underneath it (as recommended by another customer) to keep it off the roof of the car and give support. The straps are ridiculously short and wouldn’t go round the entire length of the roof rack bag. So I strapped them on the sides of the roof rack instead and used spider straps to go round the entire bag so it prevented forwards and backwards motion. Was a little concerned leaving it on top of the car overnight in our stay at a motel on the way to Scotland but the padlock i put on it kept our clothes safe. It stayed out better than I thought it would and was very waterproof! Overall reasonable value for money the but the strap issue is a pain!

A great product that we used and will re use time and time again as a family of four. Saved us so much time and space and was so efficient to use. Definitely recommend