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Specs are compiled from manufacturer listings and verified buyer reviews and can change over time — please confirm the key details on the product page before buying.
A dry bag for swimming must keep gear dry and double as a visible float for open-water safety. Most swimmers pick between a simple roll-top sack they stash onshore and a tow float they drag behind them on a waist belt. This guide breaks down the real differences—capacity, material, closure, and whether it actually floats—so you pick the one that fits how you actually swim.
I’m Mohammad Maruf — the founder and writer behind Gardening Beyond. This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
Whether you paddle a kayak or swim laps in a lake, the best dry bag for swimming is the one that seals tight, floats high, and matches the size of your gear.
Our Picks at a Glance
How To Choose The Best Dry Bag for Swimming
You need to decide one thing first: do you want a bag that sits on the shore or a float that trails behind you in the water? A tow float straps around your waist and bobbs behind you, keeping your gear with you the whole swim. A roll-top sack is better for kayaking and paddleboarding, where the bag rides in the boat with you, not on your body.
Seal type and the three-fold rule
The roll-top triple-fold seal, not the fabric, determines waterproofing. A roll-top bag works only when you fold the top over three times before you buckle it, which traps air inside and creates the seal. Fold it fewer times and you risk leaks. Bags with a simple zipper or a single fold are rarely submersible.
Material and weight
Heavier PVC and vinyl bags shrug off scrapes against rocks and boat floors, but they weigh more and take up space. Thin nylon bags pack tiny and weigh almost nothing, yet they puncture more easily. If you plan to drag your bag behind you in open water, a lighter fabric feels like less of an anchor while you swim.
Quick Comparison
| Model | Best For | Capacity | Material | Floats? | Amazon |
|---|---|---|---|---|---|
| Earth Pak Dry Bag★ Best Overall | Kayaking & boating | 55 liters | 500D PVC | Yes | Amazon |
| Cliduli Sea Turtle BagStyle Pick | Day trips & cruises | 5 liters | Polyester | Yes | Amazon |
| Sea to Summit LightweightUltra-Compact | Keys, phone & small kits | 1.5 liters | 70D Nylon | — | Amazon |
| Body Glove Dry Bag | Wet gear & gym use | 5 liters | 500D PVC | — | Amazon |
| XZSUN Swim Buoy | Open water swimming | 20 liters | PVC | Yes | Amazon |
| Osprey Ultralight Sack | Day hikes & packing | 6 liters | Nylon | No | Amazon |
| New Wave Swim Buoy | Open water visibility | 15 liters | PVC | Yes | Amazon |
| HIEMAL32 Swim Buoy | Triathlon training | 15 liters | Nylon PVC | Yes | Amazon |
| DIPPY Swim Buoy | Storage-loving swimmers | 28 liters | — | Yes | Amazon |
In-Depth Reviews
1. Earth Pak Waterproof Dry Bag
Our pick — over 4.5★ from 33,000+ verified ratings; the strongest balance of quality and price.
A 55-liter PVC hauler with a five-year warranty and a Wirecutter recommendation.
When you need one bag that covers everything from a kayak trip to a weekend camping haul, this is the one. It comes in six sizes from 5L up to 55L, and the biggest version swallows a full weekend of gear while still rolling down small enough to stash on a boat. Rated 4.7 stars by over 33,000 owners, it earns trust through real-world use.
Its 500D PVC shell resists abrasion from rocks and kayak floors. The seal withstands high pressure, even supporting a child who couldn’t swim when inflated. The IPX8 phone case fits phones up to 6.5 inches and has clear windows for underwater photos.
There are honest trade-offs to know. The 10L and 20L versions use a simple 24 to 42 inch shoulder strap, while the 30L and up get backpack straps with a sternum strap, and the 55L adds a waist belt. Some owners find the shoulder straps are the weakest point, and the phone case lanyard loop can break if you tug it hard.
What wins owners over
- Huge 55L capacity fits a full weekend of gear
- IPX8 phone case with clear windows for under-water photos
- Backed by a five year warranty
What to treat gently
- Shoulder straps are the weakest link in the build
- Phone case lanyard loop can snap under tension
- 500D PVC runs heavier than thin nylon sacks
Your pick if: you want one bag that works for kayaking, camping, and everyday beach trips, with room to spare.
Think twice if: you only need to carry a phone and keys—a 55-liter sack is far more than you’ll ever use.
2. Cliduli Sea Turtle Coral Starfish Dry Bag
A fun ocean-themed float that keeps cruise-day essentials dry and easy to carry.
This one is for the swimmer who wants their gear dry and their bag to look good doing it. The 5L polyester sack has a cheerful sea turtle and coral print, and it floats on the water so you can spot it bobbing nearby. A travel agent who tested it on cruises reports the closure keeps contents dry and the storage is enough for day trips.
You get an IPX8 certified phone case that fits phones up to 6.5 inches, with snap-and-lock access and clear windows for taking photos on the water. The bag comes with a removable shoulder strap for cross-body carry, and the roll-top closure seals by folding down 3 to 5 times before buckling. Owners who took it tubing say food and goodies stayed dry the whole trip.
The honest caveat is that this is a small sack. One buyer tested it by folding tissues inside and rolling it three times, and found minimal wetness—so it’s not a fully submersible vault. It’s best for light splash exposure, not deep submersion.
The appeal
- Eye-catching sea turtle print stands out on the water
- Floats, so it’s easy to spot bobbing nearby
- IPX8 phone case fits phones up to 6.5 inches
The limit
- Small 5L size suits day trips, not big hauls
- Not fully waterproof when fully submerged
Reach for this if: you want a compact, good-looking float for cruises, tubing, and short day trips where gear stays mostly above water.
Look elsewhere if: you plan to fully submerge your bag or carry more than a towel and a few essentials.
3. Sea to Summit Lightweight Dry Bag
A 1.5-liter featherweight that keeps keys, phone, and first-aid kits dry where bigger bags won’t fit.
Sometimes you don’t need a float or a backpack—you need a tiny pouch that keeps your phone dry while you sail or paddle. This Sea to Summit sack holds just 1.5 liters, weighs only 61 grams, and rolls down to nearly nothing. A lifeguard uses the xxs version to hold a mini first aid kit with about 30 bandages, Ace wrap, gauze, and alcohol wipes on his belt.
The build is lightweight PU-coated 70D nylon with a DWR finish, and the interior coating is white so you can see what’s inside. Waterproof seams are double stitched and tape sealed, and the Hypalon roll-top closure secures with a buckle. Owners emphasize quality most, followed by moisture resistance and size—it’s exactly right for its intended job.
The catch is that the material is intentionally thin to keep it light. That’s fine for splashes and brief dunking, but it’s not armored for rocky river beds or sharp gear. It’s a purpose-built organizer, not a heavy-duty expedition sack.
Built for precision: this is the bag for swimmers and sailors who want a defined home for small valuables, not a general-purpose hauler. The 1.5-liter size fits keys and phone perfectly, and the field repair buckle can be swapped in seconds if it ever breaks.
Best for: keeping phone, keys, and first-aid supplies dry on sails, hikes, and travel without adding bulk.
Not for: anyone needing to carry clothes or towels—1.5 liters is pocket-sized, not gear-sized.
4. Body Glove Waterproof Dry Bag
The black-on-black sack that doubles as a gym bag for your sweatiest, wettest gear.
This Body Glove bag is built for a slightly different job: containing wet stuff so it doesn’t soak everything else. The 5-liter (1.3 gallon) sack is an airtight roll-top that holds a towel or a change of clothes along with your daily essentials. One owner uses it to pack wet bathing suits and towels after a day of swimming, and reports it contains all the wet clothing without soaking through.
The 500D PVC-coated material is the same tough fabric as the big Earth Pak bag, and the roll-lock closure seals the top. The adjustable strap can be removed and attached in a couple of ways, worn across the chest or over the shoulder. It’s pitched as a paddleboard and kayak accessory, but the black-on-black look makes it work as a gym or biking bag too.
There’s a sizing note worth hearing: even the 10-liter version isn’t very big, so don’t expect to pack a full change of clothes plus shoes. And while it handles rain and splashes, the roll-top seal needs proper folding to keep water out.
Two-way protection: this bag keeps your dry gear dry on the water and keeps your wet gear contained off the water. That dual role makes it the most versatile 5-liter sack here—it never stops being useful, even when you’re not swimming.
Pick this if: you want one dependable bag for wet swimsuits at the gym, paddleboarding, and rainy-day commutes.
Pass if: you need a bright float for visibility or a bag large enough for multi-day trips.
5. XZSUN 20L Swim Buoy
A bright 20-liter tow float that inflates in 10 seconds and carries your gear behind you.
Open water swimmers need a bag that trails behind them and announces their presence. This XZSUN buoy does exactly that—it’s a 20-liter PVC cylinder in fluorescent yellow that straps around your waist with a belt and tether line. Inflate it by mouth in about 10 seconds, and you have a floating dry bag that also gives you something to grab when you need a rest.
Its bright color ensures visibility, so a snorkeler uses it as a boat marker. A paddleboarder loads it with two to three bottles of water for long-distance hydration, drinking one every 3 miles, and says you’d never know the water was in there. The soft PVC stays flexible in winter, so it works across all seasons.
The main fabric is PVC that’s described as environmental and non-toxic, and it’s durable enough for rafting, river tubing, surfing, and diving. Owners note it looks large at first but fits well once rolled down, and the waist strap is adjustable and detachable.
Why swimmers love it
- Inflates in 10 seconds with no pump needed
- Floats great and doubles as a rest aid
- 20-liter capacity holds water bottles and gear
The trade-off
- Bright yellow stands out but may fade in rocky conditions
- Rolled-down size still takes up space in a gear bag
Your pick if: you swim in open water and want a visible float that carries water, keys, and a snack without slowing you down.
Reconsider if: you only kayak or paddleboard—a tow float on a waist belt gets in the way on a boat.
6. Osprey Ultralight Waterproof Dry Sack
An ultralight 6-liter sack that rolls into a thin tube and never transfers moisture to the rest of your pack.
This Osprey sack is for the person who wants waterproof organization without hauling a heavy PVC tube. It holds 6 liters, weighs just 1.12 ounces, and rolls up into a very thin tube shape when empty. One owner uses it as a compression sack for a puffer jacket, gloves, and scarf on hiking trips, stuffing it into a day bag or strapping it to the outside.
The build is waterproof-coated nylon with a rectangular shape for efficient packing. It meets IPX5, which means it handles rain and splashes but is not designed for full submersion. That’s the key distinction from the submersible PVC bags—one owner kept phone, wallet, keys, and snacks dry on a light sea kayaking trip, handling splashes and sitting in a shallow pool of water for 2 hours fine.
The trade-off is clear in the specs: this is a splash-resistant organizer, not a submersible vault. Owners praise the quality and how fast the thin material dries, but the same thinness means it’s not the choice for serious whitewater or long submersion.
Organizer first, floater never: this sack excels at keeping wet clothes from transferring moisture to dry gear in your backpack. It’s the ideal extra bag to attach to a larger pack, not a stand-alone swim float.
Best for: hikers and light kayakers who want a featherweight, packable sack to separate wet from dry gear.
Not for: open water swimming or any situation where the bag will be fully submerged.
7. New Wave Swim Buoy
The donut-shaped float that open water swimmers call essential safety gear, visible from 800 yards out.
When your swim takes you into boating lanes, visibility is the whole game. This New Wave buoy is a bright yellow PVC donut that swimmers say is visible from at least 800 yards away. It straps to your waist and trails behind you, barely noticeable while you swim but always there when you need to rest or signal boats.
The buoy weighs only 10 oz and inflates and deflates easily, packing down to sandwich size. Owners use it for open water lake swims, snorkeling, and as a marker to keep boats away. The buoyancy provides a safe place to float and rest if you cramp up or get tired, which is why it’s described as essential safety gear rather than just storage.
The honest limitation is the storage pouch. The dry compartment is large but not fully sealed—water can seep into the air hole over time. That’s why experienced owners keep phone and keys in a separate waterproof pouch inside, using the buoy primarily for float support and visibility.
Safety first
- Extremely visible to boaters from 800 yards away
- Weighs only 10 oz, so it barely drags while swimming
- Provides a rest float if you cramp or tire
Know the limits
- Dry pouch is not fully sealed—use a waterproof case for valuables
- PVC material can bump your legs when you stop
Your pick if: you swim in open water near boats and want a highly visible float that also gives you a rest point.
Reconsider if: you need a truly waterproof dry bag—this float is for visibility and buoyancy first, storage second.
8. HIEMAL32 Swim Buoy
A triathlon-ready buoy with a toughened nylon shell that keeps you afloat and visible in open water.
Triathletes training in open water need a buoy that’s easy to inflate, comfortable to wear, and quick to spot. This HIEMAL32 model checks those boxes with a toughened nylon PVC shell and an ultra-high visibility color. One triathlete new to the sport reports it’s so easy to inflate and wear that it doesn’t bother him during swims, and it easily keeps him afloat when he needs a break.
You can fit a surprising amount inside this swim buoy. One snorkeler reports packing three iPhones, two wallets, a med kit, and two sunscreens, while another swimmer stores diabetic supplies and a camera with a kit lens. The double-seal two-way valve (a valve that lets air in and out through the same opening) makes inflation and deflation quick, and the sturdy recovery handle gives you a solid grip when you pull it back to shore.
There are two caveats to weigh. The leash is short—about 12 inches or 30 cm—which some owners say needs to be double the length for comfortable towing. And while the shell is sturdy, it’s not a life preserver; it’s a visibility and rest aid, not a substitute for flotation training.
Built for training
- Toughened nylon shell resists punctures better than bare PVC
- Holds three iPhones, wallets, and a full med kit
- Double-seal valve makes inflation fast and simple
What to watch
- Short 12-inch leash limits comfortable towing distance
- Not a life preserver—use it as a safety aid, not a rescue device
Pick this if: you train for triathlons or swim in open water regularly and want a sturdy, high-capacity buoy that handles rough use.
Pass if: you want a long tow line for relaxed swimming—the short leash will annoy you.
9. DIPPY Swim Buoy
A 28-liter camo float with dual air chambers for swimmers who carry everything but the kitchen sink.
If you like to bring more gear than the average swimmer, this DIPPY buoy has the biggest storage of any float here. At 28 liters, it swallows keys, a Garmin watch, a phone float, cash for a snack, and still has room left over. One owner stores keys, flops (water shoes), and a goggle case inside, and everything stays dry.
The dual air chambers add extra support and buoyancy, making it a reliable rest float as well as a dry bag. The camo design in bright orange stands out from the crowd while keeping you visible to boats and other water users. It’s pitched for everyone from triathlon trainers to novice swimmers to paddleboarders.
The recurring note from owners is that the included phone case is the weak point—it’s hard to open and close, the touchscreen doesn’t respond well, and the stiff sides hinder button access. The float itself is solid and buoyant, but plan to use your own phone protection instead of the bundled case.
Maximum capacity
- 28-liter storage is the biggest of any buoy here
- Dual air chambers add buoyancy and rest support
- Bright camo design keeps you visible to boats
The weak spot
- Included phone case is stiff and hard to use
- Large size adds drag for slower swimmers
Best for: swimmers and paddleboarders who carry a lot of gear and want a float that doubles as serious storage.
Not for: minimalists who just need phone and key protection—a 28-liter float is overkill.
Understanding the Specs
IP Ratings for Waterproofing
The IP rating tells you exactly how much water a bag can handle. IPX8 means the bag can be submerged continuously—that’s what you want for a true dry bag that might sink. IPX5 means it handles rain and splashes but should not be fully dunked. A bag rated IPX5 is fine for kayak trips and light exposure, but it’s not the pick for open water swimming where the bag trails behind you.
Capacity in Liters
Dry bags are sized in liters, and the number tells you how much gear fits. A 1.5-liter sack is phone-and-keys territory. A 5-liter bag holds a towel and a change of clothes. A 15-to-20-liter buoy carries water bottles, snacks, and a med kit. A 55-liter sack swallows a full weekend of camping gear. Match the liters to what you actually carry, not what you might carry someday.
FAQ
Can I use a regular dry bag as a swim buoy?
How many times do I need to fold a roll-top dry bag for it to be waterproof?
What is the difference between a dry bag and a swim buoy?
How much weight can a swim buoy support for floating?
Will a 5-liter dry bag fit a towel and change of clothes?
How do I keep my phone dry inside a swim buoy?
What material is best for a dry bag used in rocky water?
How long does it take to inflate a swim buoy?
Final Thoughts: The Verdict
For most kayakers and boaters, the best dry bag for swimming is the Earth Pak because its 55-liter capacity, IPX8 phone case, and five-year warranty cover every water scenario. If you’re an open water swimmer who needs visibility and float support, grab the New Wave Swim Buoy for its 800-yard visibility. And for the swimmer who carries everything, the DIPPY with its 28-liter dual-chamber float is the one to reach for.
How We Picked
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources & Methodology
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of August 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
As an Amazon Associate, Gardening Beyond earns from qualifying purchases. This does not affect which products we feature.