Most paddlers need two dry bags, not one. A small one that stays on your body or within reach, holding phone, keys, and car fob. A bigger one that lives with the boat, holding the dry layer and the food. One bag does both jobs badly. Two do them well.
Nobody writes this down, which is strange, because every paddler figures it out the same way: by getting on the water once with everything in a single bag, buried under everything else, and deciding never to do that again.
The sizing guides all answer which bag. This is the answer to how many, which turns out to be the more useful question.
Why do two dry bags work better than one?
Because the things you carry on the water split cleanly into two piles: what you need while you are moving, and what you need when you stop. The first pile is small, and it needs to be reachable without unclipping anything or digging. Phone. Keys. A card. Maybe a snack you will absolutely eat before you are halfway out. That is a 2 liter, clipped to a PFD or a deck line, and it never leaves you.
The second pile is bigger and you do not touch it until you are off the water. A dry shirt. Lunch. A towel. A hat for the drive home. That is a 10 liter or a 20 liter, strapped down where it stays put, and the whole point of it is that you can forget it is there.
Put both piles in one bag and you get the worst of it. Either you sized up and now your phone is at the bottom of 20 liters of lunch, or you sized down and your dry shirt did not come. Two bags is not an upsell. It is what everybody who paddles regularly ends up doing anyway, usually after buying the wrong single bag first.
What size combination should you actually buy?
For a day paddle, a 2 liter plus a 10 liter covers almost everyone. The 2 liter takes a phone (in a case, it fits), keys, and a card, and clips where you can reach it. The 10 liter takes a change of clothes, lunch, and a small towel, and comes with a detachable strap so it can hang off your shoulder for the walk down.
Step up to a 2 liter plus a 20 liter if you are out longer, paddling with kids, or carrying for more than yourself. The 20 liter has two detachable straps, so it wears as a backpack for the carry from the car, which matters more than it sounds like it does at the end of a long day at a launch with a long walk.
Three bags is a real answer for some people, not a greedy one. Camping trips, multi-day river trips, and anyone who wants wet gear separated from dry gear on the ride home all justify a third. Our sizing guide works through liters against actual contents if you want to check your own math.
Does having them in different prints actually help?
Yes, and this is the part that sounds like a design excuse until you have done it. When your small bag and your big bag are visibly different, you stop looking. You reach for the Yuba because the Yuba is the phone bag, and your hand knows that before your brain does. Two bags in the same black nylon means you open one, close it, open the other one.
It works even better if you paddle with a crew, because your bags stop being confusable with anybody else's on a shared beach. This is the least glamorous argument for color we have and it might be the most practical one. Pick two prints that do not look alike from four feet away and let that be your filing system.
Building the set
Wild Currents makes roll-top dry bags in 2 liter, 10 liter, and 20 liter, in five prints, and the sizes were built to be combined rather than chosen between. If you are putting together more than one, the bundle page is worth a look, and if you are still deciding on sizes, start with what size dry bag you need or what to pack in it. Browse the collection.
Frequently Asked Questions
How many dry bags do I need for kayaking?
Two for a day paddle: a 2 liter for phone, keys, and card that stays on your body or within reach, and a 10 liter or 20 liter that stays with the boat for your dry layer and food. Add a third for camping or multi-day trips.
Can I get by with just one dry bag?
Yes, but you will compromise. A single small bag will not hold a dry change of clothes, and a single large bag buries your phone under everything else. If you only buy one, buy the size that matches the job you do most.
What is the best two-bag combination for paddleboarding?
A 2 liter clipped to your PFD or leash attachment plus a 10 liter bungeed to the deck. Board decks favor keeping the big bag low and strapped rather than worn, so the 10 liter is usually the better second bag than the 20 liter.
Should my dry bags be different colors?
It genuinely helps. Different prints mean you reach for the right bag without looking, and your gear stays distinguishable from everybody else's on a shared beach.
Do I need a third dry bag for wet gear?
If you drive home with soaked clothes in the back of your car, yes. A dry bag holds water in as well as out, which makes it the tidiest way to carry a wet pile.