I actually have two different brands of drysacks. I have two 20l Outdoor Research dry sacks and a three-pack of Outdoor Products multiple size dry sacks in 2.1l, 4.1l, and 7.9l sizes. I will review them in order.
The Outdoor Research bags are pricier than the Outdoor Products bags at almost $30 a piece but for the price they are extremely durable and of heavy-duty construction. They are also waterproof to the point where you can submerge them completely and they remain dry inside. I would even guess that one of these could be used as an emergency flotation device if you needed one. I tested my first one of these by weighing it down with a t-shirt wrapped brick and a few wads of toilet paper inside and leaving it submerged in the creek behind my house over the weekend. It stayed bone dry on the inside over the weekend.
I have two because I use these as my main dry sack for inside mine and my wife’s BOB bags. I have used other Outdoor Research gear over the years and never been anything but impressed. I had a 30l dry sack for over ten years that I always took to the field with me because it was better than the Army issue dry sack. Unfortunately, the dry sack was not shrapnel proof and a too close IED in Iraq put paid to that one.
One thing in particular that I like about the Outdoor research bags is that they have nylon loops on the outside so that you can attach your dry sack to the outside of your ruck if needed. I personally have mine on the inside right now but like the fact that the loops provide the versatility of keeping the sack if I need my main ruck compartment for something else.
I wholeheartedly recommend the Outdoor research dry sack if you want a durable, heavy duty dry sack to keep your essential gear dry that won’t break the bank. They are made of durable material and the robust construction shows the quality of the bag throughout. It is available in multiple sizes so you can get the size you need for your particular setup. A great bag.
Now to the second set of bags. Outdoor research also has three-pack of ditty bad dry sacks that were almost twice as expensive as the Outdoor Products ones when I bought mine. At the time of writing the Outdoor Products 3-Pack Dry Sack go for $16.00 and the Outdoor Research Dry Ditty Sacks three-pack is $31.00. When I bought mine the Outdoor Products bags were $10.00.
When I first got them I thought they were kind of flimsily constructed and was very skeptical on how well they would work. I did the same test with them as I did with my 20l bag and to my surprise the contents stayed dry even though they are specifically advertised as being not suitable for submersion.
They are made of a nylon weave and fairly thin which makes them super light compared to my other bags. The three sizes are useful as you can use the size you need instead of using more bag than necessary. I would be careful about putting anything with sharp points or edges into these bags but they are great for keeping spare socks and a t-shirt dry without taking up a ton of space.
I like these bags as they are lightweight and it is easy to carry an empty one as a spare without sacrificing space. I have only had these about six months and have not really used the hell out of them yet but am not sure they will last in the long run as I am sure my Outdoor research bag will. These are a good interim choice if you are on a budget but I would plan on buying more expensive but also more durable bags in the future as you continually improve your kit.