A dry bag doubles well for backpacking if you already own one for paddling. The 20 liter wears as a backpack for shorter carries and lighter loads, and the roll-top keeps a sleeping bag dry through a rainy fall trail. For long miles with a heavy load, a dedicated pack with a hip belt still carries better.
Fall is when this question comes up most, since rain risk goes up right when a lot of paddling gear is heading into the closet for the season anyway. Here's the honest version of what a paddling dry bag can and can't do on a trail.
When does a paddling dry bag actually work for backpacking?
For short-to-moderate hikes to a campsite with a manageable load, the 20 liter's detachable backpack straps do a genuinely good job, and the roll-top keeps everything inside dry through rain that would soak straight through an uncoated pack. It also works well as a dry liner inside a real backpacking pack, protecting your sleeping bag or spare clothes even if the pack itself is only water-resistant. Fall trips are a strong fit specifically because wet weather is more likely and the payoff for dry gear is higher.
Where a dedicated backpacking pack still wins
Long mileage with a heavy load is where a real backpacking pack pulls ahead. A dry bag's straps are built for a reasonable carry, not for the hip belt and frame system that transfers weight off your shoulders over many miles. If you're doing serious distance with 30 or more pounds, a pack built for that job will be more comfortable by the end of day one than any dry bag, however good the straps are. That's not a knock on the dry bag, it's just not the tool built for that specific job, and saying so plainly is worth more than pretending otherwise.
How to use it well
For a short or light overnight, the 20 liter can be your whole pack. For anything longer or heavier, use it as a liner: pack your sleeping bag and spare clothes inside it, then load that into your regular backpacking pack. Either way, the roll-top does the same job it does on the water, keeping the fold count at three or more and rolling correctly. If you're not sure which size fits your trip, what size dry bag you need walks through the sizing logic, and how to seal a dry bag covers the roll.
One bag, more than one season
Wild Currents makes roll-top dry bags in 2 liter, 10 liter, and 20 liter, built for the water and honestly useful well past it. Browse the collection.
Frequently Asked Questions
Can I use a dry bag for backpacking?
Yes, for shorter or lighter trips as your main pack, or as a dry liner inside a real backpacking pack for longer trips. It's a genuinely useful crossover, with honest limits on heavy, long-mileage trips.
Is a dry bag as comfortable as a backpacking pack for long hikes?
No. A dry bag has no hip belt or frame, so its straps are built for a reasonable carry, not for transferring heavy weight off your shoulders over many miles.
What size dry bag works best for a backpacking trip?
A 20 liter for a short, light overnight as the main pack, or as a liner inside a dedicated backpacking pack for anything longer or heavier.
Will a dry bag keep my sleeping bag dry while backpacking?
Yes, rolled correctly. This is one of its best crossover uses, whether it's your main pack or a liner inside a larger one.
Is fall a good time to bring a dry bag backpacking?
Yes. Rain risk goes up in fall, and a roll-top keeps gear dry through wet trail days better than most standard backpacking pack fabric alone.