I use this for hiking: I put a sack of rice and some other weight in it and strapped it to my backpack and go hiking for a cardio workout. I don't feel the seams will burst due to Its heavy construction, and if it rains, the contents won't get wet and weigh a ton. Solid piece of gear I'll use for a long time.I took this on a trip to Zion Narrows to protect my Canon EOS 5D Mark IV DSLR with 24-70mm f/2.8L lens.It protected my camera gear very well, and garned quite a few looks and compliments. It worked very well.The 20L packs a LOT of gear: camera + lens, a fleece jacket, and lunch (for 2 people), yet was only half full. A 10L would have been just right.Inflate the bag (keeping air filled in) to ensure it floats in the water. Fold the top several times to seal the bag shut, and clip the top to use it as a convenient carrying handle (or in my case, to clip to my backpack while hiking through the Zion Narrows).I wish the bag came in a transparent version so you could more easily see the content within.Price is comparable to another brand I purchased before.If you found this review helpful, please hit the "Helpful" button below to encourage me to write more. Thank you!This is my first time owning a dry bag like this. I had seen a few friends with them and was curious. We just returned from a beach trip and this thing worked great. If you look at how it operates you might be nervous about its ability to keep water out. I can tell you that it seals so well and is so easy to close. When I first received the bag, I tested the closing. I closed it and it contained air, which it does normally unless you squeeze the excess air out. Think of it like a ziploc bag when you close it without squeezing out the air. I didn't think much of it, but a couple of weeks later it was sitting in my closet so I checked it. It still had the same amount of air in it. In fact, I squeezed it and it stayed inflated. None of the air leaked out of the opening while it was folded over and clicked shut. If air can't escape, there is no way water is getting in.On the beach trip we used it at a water park, by the pool, and on the beach. We also tossed it in the car a bunch of times. We never had to worry that what was inside would get wet. Everything stayed dry. I used it to store towels, clothes, phones, wallet, keys, etc. And the thing about it holding air, that is great if you don't want what you are storing to get crushed. I wouldn't use it to hold something up, but in general use, it keeps stuff safe and dry.I don't do any activities that would require the use of a dry bag or that would test the usage of a dry bag. I got this bag because my plan was to use it to put my clothes in during my vacation and then add some water and soap to wash them and rinse them. They have bags that do this but they are more expensive. Unfortunately, this wasn't delivered until the day after I left for vacation. I got the 20 L version.There were no instructions for this but I assumed you folded it over 3 times or so and then buckled it. I went ahead and washed a few clothing items in it to test the resistance of water getting out which I suspect is harder than keeping water out. and it worked well. I was shaking the bag back and forth with clothes and soap and water in it. The bag held the water in and it did not leak. I am sure under pressure and given more time it would have but that isn't how this bag is designed to work.The material seems like it is pretty heavy duty yet still thin. It comes with a repair kit which is pretty nice if the bag gets a small hole.This can be used to help somebody float in an emergency situation if it is filled with air. Since it claims 20 liters capacity then this would provide about 40lbs buoyancy full of air, if possible.Plenty of times I've need to store something protected from the elements. This does that and is a decent size for personal use and to carry if you need to. I tried a set of bicycle panniers that had this same type of closure where you roll the top up then clip it in. That creates many layers so water can't get through the opening vs a single zipper. But they take time to undo and get into the bag so I wouldn't want to store my camera in it because I like immediate access to my camera. Other than that it is a great bag to keep thing dry in.The Dry Passage series of dry bags from Alps Mountaineering runs from 5 liters to 50 liters in capacity, is made of TPU coated 420D nylon and comes in either of two colors: 'charcoal' (a medium/dark gray) or 'gold' (yellow).This dry bag is sealed by rolling the top down, then securing the buckle, which is very easy. As with all dry bags, if the contents are water sensitive (electronics, for instance, as opposed to clothes) care should be exercised when opening the bag to avoid letting any residual water into the interior of the bag.It's worth contrasting this series of dry bags with the Torrent series from the same manufacturer. The size ranges overlap, with the Torrent series running larger, from 20 liters to 70 liters. Also, the Torrent series is made of 500D polyester PVC, has multiple D-ring attachments and comes in a different color selection.This is an awesome bag. Got this one to replace one we had for many years. This bag is a perfect size to keep some back up clothes, electronics, and other valuables dry when you’re near water. We use it for the lake and Especially when we go floating down the river. It’s the 20L and I find it big enough for several items. A couple towels, couple shirts, socks, shorts, suntan lotion, phones, small portable speakers for your phone, and some snacks you don’t want to get wet. The bag is water proof and air right when rolled down the correct way. It even comes with a small patching kit to repair any small holes that may appear in the future. Hopefully I won’t need that but I’ll keep it close by just in case. As for now this bag gets 5/5 stars.Good quality but overpriced