Very well made roll bag, other reviews are pretty much spot on. Not tested it in the wet but have no reason to doubt it is 100% waterproof. The bag material itself is a lot heavier and more substantial than other bags i have had and seen. I was surprised by this considering how much cheaper it is than other name brands. The tie down straps function very nicely, they are not of the greatest quality but for this price perfectly acceptable. The air release valve is a great feature to be able to pack down your contents and roll the bag top tightly. With top handles and a separate shoulder strap the bag can be taken anywhere, not just on a motorcycle. Extremely happy with this purchase.Wow, I am so impressed with this bag! I bought the 40L version for a motorcycle camping trip - it held my tent, sleeping bag, inflatable sleeping pad, and 4 days worth of clothes, with some extra room to spare. The straps hold the bag VERY securely - I did 900 miles of some of the twistiest roads in the US, and this bag did not shift or budge AT ALL. I never got rained on so I did not get to test the waterproof claims, but the roll top velcros and then buckles tightly shut, so if it's properly rolled I don't think there's any way water can get in. The air release valve is a nice feature, really lets you squish everything into a compact package. There are extra straps on the bag that allow you to stack another bag on top of it - I used them to hold an extra sleeping pad. Highly recommend this bag!This bag is sturdy, and has a air release. It really makes a difference when you roll it up. It also has strong straps for carrying.This bag is great for a weekend and if you know how to pack..a month. It was put to the test in Kentucky and the Virginia's. During these storms that brought flooding to the area. Clothes and gifts were dry as a summer day!I have the 60L version and it's a great bag. It fits well sideways and inline on my Harley Pan America. When I first got it I was worried it was too big, but once I packed it full of gear and strapped it on, it fit great. If you have panniers and are not going out for weeks at a time, I'd recommend a smaller one. If this is going to be the only bag you carry and you don't plan on having a passenger, it's the right buy.I bought this for my klr650. I’m doing the WABDR next week and first impressions are good. I was able to fit my tent, sleeping bag, sleeping pad, pillow, camping chair and still have room for a pack of beer! The straps are nice to hook to the bike and unclip from the bag easily if you wanted to remove from the bike for the night. I’ll update review after trip but it’s looking good!This bag was awesome the included straps offer great versatility for strapping to your bike. I rode 250 miles in torrential downpours and everything stayed perfectly dry and securely in place. highly recommend this.Great bag. Attaches easily with quick release clips. Holds a lot of clothing. Bag is as good as more expensive ones.Brilliant bag strong and waterproof perfect for carry work gear (boots trousers helmet ect).Only issue us bought it to use on motorcycle, the straps that come with ain't very good they font adjusted well and hold the position so bag comes loose but I bought cheap small adjustable straps instead that did the trick.Also would be nice if there was a shoulder strap to add to this.Great bag fprnevery day use. I store all my work equipment and firat aid gear in there and its always dry.The only drawback in my eyes is having nowhere to but the straps on the bike when it's not being used. It would be nice to be able to wind them up and leave them on the bike rather than taking them off all the time when you don't need the bag.Other than that a great piece of kit.This is a good bag you can feel quality.But the opening was a bit small for me and what I wanted to use it for. But for normal use of just put little things and some shirts and shoes or a thing like that is perfect .so although I send it back but I give it 5 starsThese bags are great, im really impressed, i got the 40 l and on the strength of how pleased with that i was i also got the 20l.They mount onto the bike really well, lots of strap options and you can mount one bag ontop of the other by going through the D rings on the lower bag, choice of colours to match the bike.2 man tent fits into the 40l and 2x sleeping bags into the 20l.....Super Waterproof large bag - 40 good enough for two people traveling for one week (except if you want to take big winter jacket in it). Great at the back of saddle and easily adjusted, do not move, so perfect from Security point of view also thanks to its color. Very satisfied, and already advised to friends.