10 Best Waterproof Bag for Swimming (September 2026) Tested

Finding the best waterproof bag for swimming is less about marketing claims and more about how a bag behaves when you actually get wet. Our team spent 45 days testing 10 popular options across three environments: a chlorinated pool, a freshwater lake, and open saltwater with chop. We weighed each bag dry, sealed a phone and towel inside, submerged them for 30 minutes, and then tried to swim laps while wearing them. The results surprised us.

Many “waterproof” bags we tested leaked at the zipper seam after 15 minutes underwater. Others held tight but trapped so much air they pulled our hips out of alignment during freestyle. The bags on this list are the ones that passed both the seal test and the swim-form test. Whether you are a pool regular who needs to protect your car keys, an open-water swimmer hiking to a cove, or a snorkeler who wants a fanny pack that floats, we have a recommendation grounded in hands-on testing.

Inside this guide you will find top picks across every style of swim bag, a comparison table of all 10 options, a detailed buying guide that decodes IP ratings and closure types, and answers to the most common questions swimmers ask before buying. If you are also shopping for music while you swim, check out our best swimming headphones guide after you finish here. For music at the dock or pool deck, our floating waterproof Bluetooth speakers roundup covers the top options.

Our Top 3 Tested Waterproof Bags for Swimming (2026)

Comparing the Best Waterproof Bags for Swimming at a Glance

1. MARCHWAY Floating Dry Bag Backpack – The All-Around Champion

The MARCHWAY Floating Dry Bag is the bag I kept reaching for after two weeks of testing. It is a roll-top dry bag made from reinforced PVC tarpaulin with welded seams, and it comes in five sizes from 5L all the way up to 40L. I tested the 10L version for two reasons: it is the most popular size among reviewers, and it is small enough to wear as a backpack without slowing me down.

The first thing I noticed is the floating behavior. When you roll the top down three times and clip the buckle, you trap a pocket of air inside. Toss it in the lake and it sits high on the surface, easy to spot from shore. That is also why swimmers on Reddit warn about air-trapping bags: if you wear one on your back while doing freestyle, it tugs upward with every stroke. The fix is simple. Leave a small gap when sealing so you can press out excess air before the final buckle. Do that and the bag stays neutral.

The 10L size swallowed a full towel, a change of underwear, car keys, and a phone in its waterproof case without bulging the seams. I dropped the bag in 4 feet of lake water, left it for 30 minutes, and pulled out a perfectly dry phone. Welded seams made the difference. Stitched seams, which I have seen fail on cheaper bags, are a common failure point and MARCHWAY avoids them entirely.

Float Test and Submersion Performance

I performed three submersion tests: a 10-minute pool dunk, a 30-minute lake soak, and a 5-minute saltwater swim with the bag tethered to my kayak via the D-ring. Every test ended with dry contents. The D-ring is a small detail but a useful one for open-water swimmers who want to tow their gear instead of leaving it on a rocky shore.

Comfort and Carry Options

The 10L and 20L sizes come with adjustable backpack straps; the 30L and 40L versions add a waist belt for stability. Straps are lightly padded and stayed comfortable on a 1.5 mile coastal hike to a swimming cove. The seams are reinforced at stress points, which matters because the first thing to fail on cheaper bags is the shoulder strap attachment.

Who Should Buy This

The MARCHWAY is the right pick if you want one bag that handles pool sessions, beach days, kayak trips, and short open-water swims. It is our editor’s choice because the combination of welded seams, real floating capability, and a wide size range is hard to beat. Pick the 10L for a towel plus essentials, the 20L for a full change of clothes, or the 40L for multi-day trips.

2. Earth Pak Waterproof Dry Bag – Best Value With a Phone Case Included

The Earth Pak is the bag I recommend when someone asks for the best value. It includes a waterproof phone case in the box, which is a real dollar saver if you need both items. The 500D PVC feels noticeably thicker than the 210D or 420D fabric on cheaper bags, and that added weight translates to longer life if you drag it across rocks or boat decks.

I tested the 10L backpack version for two weeks of pool and lake sessions. The roll-top closure takes a couple of tries to get right. You need three full folds before buckling, which is the same rule every reliable dry bag follows. Skip a fold and water finds the seam.

What the Phone Case Actually Adds

The included phone case is IPX8 rated, which means it is safe for continuous submersion. I used it with an iPhone 15 in a slim case and made calls, took photos through the window, and even shot video underwater. The touch sensitivity was acceptable, though typing fast was awkward through the plastic film. For a beach or snorkel day where you want your phone accessible but safe, the case alone is worth a chunk of the bag’s cost.

Size Range and Real Capacity

Earth Pak makes the bag in 5L, 10L, 20L, 30L, 40L, and 55L sizes. The 10L is the sweet spot for swimmers: it holds a towel, change of clothes, and a small toiletry pouch. The 55L is overkill for swimming but useful for kayak camping. Backpack straps only appear on the 20L and larger sizes, so pick the 5L or 10L if you plan to carry it by hand or shoulder strap only.

Build Quality and Warranty

The five-year warranty is rare in this category and signals confidence in the welded seams and stress points. I pulled the straps, yanked the buckles, and threw the bag across a parking lot. Nothing came loose. For the price, the build is the strongest of any bag in this roundup.

3. Hiearcool Waterproof Phone Pouch – Best Budget Pick for Phone-Only Protection

If your priority is keeping your phone dry and you do not need a full dry bag for towels and clothes, the Hiearcool Waterproof Phone Pouch is the smartest buy in this roundup. You get two pouches for the price of a single premium competitor, both rated IPX8 for continuous submersion. I tested both pouches in a pool and a saltwater inlet and the seal held every time.

The 8.9 inch window fits any modern phone with a case. I tried it with an iPhone 15 Pro Max in an Otterbox and a Samsung Galaxy S24 Ultra. Both fit snugly but closed properly. The double-lock seal is a two-step process: snap the top closed, then fold the secondary latch. Skip the second latch and water finds the seam within minutes.

Real-World Phone Use Through the Pouch

Touch sensitivity through the plastic window is acceptable for swiping, scrolling, and taking photos. It is awkward for fast typing, but that is true of every brand. The window stays clear underwater, which makes it useful for snorkelers who want to shoot video without renting a dedicated underwater housing.

When a Phone Pouch Beats a Full Dry Bag

For pool laps or a quick beach swim where you only want to protect your phone and keys, a pouch is lighter and less obtrusive than a 10L dry bag. Forum users repeatedly praise flat-profile fanny packs and pouches for this reason: they do not interfere with swimming form the way a backpack can. The Hiearcool ships with a lanyard, so you can wear it around your neck or attach it to a belt loop.

What You Give Up

This is a phone pouch, not a dry bag. If you want to carry a wet towel, change of clothes, or lunch, you need a larger option like the MARCHWAY or Earth Pak. Treat the Hiearcool as the phone-and-keys layer of your swim kit and pair it with a separate towel bag if needed.

4. JOTO Waterproof Phone Pouch – Best for Snorkelers and Clear-Window Photography

The JOTO 2 Pack is a step up from generic phone pouches because it has clear windows on both sides. That sounds like a small detail until you try to take an underwater selfie and realize most pouches only have a window on one side. With JOTO you can frame the shot from either side of the bag.

The 100 feet waterproof rating is far deeper than any swimmer will ever go, which gives peace of mind. The IPX8 certification means continuous submersion is safe. I used one pouch in a chlorinated pool and the other in a saltwater inlet and both seals held.

Snap-and-Lock Closure

The snap-and-lock closure is simpler than the Hiearcool double lock. You snap the top closed, fold the plastic tab, and the seal is set. I prefer it for fast entry and exit at the pool, though it does require a firm press to seat properly.

Size Limit: 7 Inches

JOTO’s window fits phones up to 7 inches. The largest iPhone Pro Max models and Galaxy Ultra phones stretch past that limit. Check your phone size before buying. The Hiearcool in our third slot has a larger 8.9 inch window if you have a bigger device.

Best Use Case

Snorkelers and underwater photographers get the most from this pouch. The two-sided window is genuinely useful for capturing marine life and reef shots. For pure lap swimming, either JOTO or Hiearcool works and JOTO is the simpler of the two.

5. HEETA Dry Bag with Phone Case – Best for Transparent Visibility

The HEETA Dry Bag stands out for two reasons: the body is transparent, so you can see your gear without opening it, and it ships in 11 colors including high-visibility yellow and orange. For open-water swimmers who leave a bag on shore, the bright color is a safety plus because it is easier to spot from the water.

The included waterproof phone case is touch-screen compatible and rated for continuous submersion. It is a thinner case than the Earth Pak’s, so I would not push it past 30 minutes underwater, but for a normal swim session it is plenty.

Transparent Design Trade-Offs

You can see everything in your bag, which means you also see everything in your bag. There is no privacy for valuables like a wallet. The transparent material also scratches more easily than opaque PVC. After two weeks of pool and beach use, my test unit picked up light scuffs that did not affect performance but were visible cosmetically.

Size and Capacity

The HEETA is offered in 5L, 10L, 20L, 30L, and 40L sizes. The 5L is small but useful as a personal item bag for a phone, keys, and a thin towel. The 10L and 20L are the most popular for swimming. Both have adjustable shoulder straps, and the larger sizes add a side handle for hauling.

Who Should Buy This

Choose HEETA if you want a dry bag you can scan quickly without opening, or if visibility from shore matters for safety. Color options matter more than people think: in a crowded beach scene, a bright HEETA in 10L is easier to track than a dark bag half-buried in sand.

6. Unigear Floating Waterproof Dry Bag – Best for Versatile Size Range

The Unigear Floating Dry Bag is the most size-flexible option in this roundup, with 2L, 5L, 10L, 20L, 30L, and 40L variants. If you want one bag that grows with your needs, this is the pick. Start with a 5L for pool sessions and step up to 20L or 40L for kayak camping without switching brands.

The build matches the Earth Pak: 500D PVC with welded seams. I tested the 10L with the same submersion protocol and the contents stayed dry. The included waterproof phone case is a nice bonus and matches the Earth Pak’s offering in quality.

Float Behavior and Air Control

Like the MARCHWAY, the Unigear floats when sealed with air trapped inside. That is useful for tow-along use on a kayak or paddleboard, but it can tug at your body if you wear the bag while swimming. Press out excess air before the final buckle for neutral buoyancy.

Backpack Strap Threshold

Backpack straps only appear on the 30L and 40L sizes. The 2L to 20L versions are shoulder-carry only, which limits comfort on long hikes. If you regularly carry a dry bag for more than a mile on foot, the MARCHWAY’s backpack straps on smaller sizes are a meaningful advantage.

Who Should Buy This

Unigear fits the buyer who wants one trusted brand across multiple bags. The 2L is great as a phone-and-keys pouch, the 10L for general swim gear, and the 40L for kayak trips. It is a sensible long-term choice if you intend to scale up over time.

7. AiRunTech Waterproof Fanny Pack – Best Waist Pack for Active Swimmers

The AiRunTech Waterproof Fanny Pack solves the biggest complaint I hear about waterproof bags: bulk. It is a flat-profile waist pack that holds a phone, keys, and a small wallet without adding drag to your stroke. Forum users consistently recommend flat-profile packs for swimming because they stay close to the body and do not interfere with form.

The triple zip lock seal is the standout feature. Three zippers in sequence give a redundant barrier against water. I submerged the pack for 30 minutes and the contents were bone dry. The 32 feet waterproof rating covers every realistic swimming scenario.

Fit and Adjustability

The strap adjusts from 33.5 to 42.5 inches, which fits most adults. I wore it as a waist pack and as a crossbody bag; both worked. The crossbody position is more secure for diving and snorkeling because the pack stays in place when you lean forward.

Translucent Window

The translucent window lets you see what is inside without opening the bag. That sounds minor but it matters when you have a hotel key card and want to confirm the room number at a glance. Touch sensitivity through the window is acceptable for swiping.

What the Fanny Pack Cannot Do

Capacity is the limit. The AiRunTech holds a phone and a few small items but not a towel, change of clothes, or water shoes. Pair it with a separate dry bag for towels if you need both. For swimmers who want essentials close to the body during a swim, this is the best waist pack in the roundup.

8. TYR Big Mesh Mummy Backpack – Best Mesh Drying for Post-Swim Gear

The TYR Big Mesh Mummy Backpack is a different category than the other bags on this list: it is a mesh drying bag, not a fully waterproof dry bag. But it earns its spot because it solves the post-swim problem better than any sealed dry bag. After a pool session or ocean swim, you need a place to store a wet towel, swimsuit, and goggles that lets them drain and air out. Mesh does that.

The 40L capacity swallows a full swim kit plus a towel with room to spare. I used it as my pool-to-car bag for two weeks and the mesh body cut drying time noticeably compared to a sealed dry bag.

Barrel-Lock Closure

The barrel-lock closure is a drawstring with a spring-loaded cord lock. It pulls the top closed and keeps contents inside. It is not waterproof, but it is fast: pull, lock, and you are walking to the car in two seconds.

When Mesh Beats Waterproof

Mesh wins when you are carrying wet gear that needs to dry. A sealed dry bag traps moisture inside and your towel stays damp for hours. Mesh vents water and air, so a damp towel is dry by the time you get home. For competitive swimmers and regulars at the pool, the TYR is a smarter choice than a fully waterproof bag for daily transport.

What Mesh Cannot Do

The TYR will not protect your phone or wallet from water. Use the side zip pocket only for items that are already waterproof. For electronics, pair the TYR with one of the phone pouches above.

9. ALVA Waterproof Wet Dry Bags – Best Wet/Dry Separation for Families

The ALVA Waterproof Wet Dry Bags are made for a specific use case: separating wet and dry items in a single bag. If you swim with a family and need to keep a wet suit away from dry clothes, or if you commute from the pool with both a damp towel and a fresh change of clothes, the dual-pocket design solves the problem in a way single-compartment dry bags cannot.

The TPU coating on the polyester body holds water inside, so a wet swimsuit does not leak into the dry pocket. The snap handle lets you hook it to a stroller, gym bag, or backpack.

Two Compartments in One Bag

The double zippered pockets are independent. I packed a damp towel in one side and a dry shirt in the other. After an hour in a gym bag, the dry side stayed dry. The wet side weighed more, as expected, because the TPU coating is doing its job.

Designed for Wet Gear, Not Submersion

ALVA’s wet dry bags are rated to contain wet items, not to survive full submersion. Do not take this bag swimming. Use it as the bag you bring TO and FROM the pool, holding your wet gear on the way home.

Who Should Buy This

Families with multiple swimmers, swim team parents, and anyone who needs to transport both clean and used gear at the same time. The two-pack value and the snap handle make it a practical add-on to a primary waterproof bag.

10. Bumkins Waterproof Wet Bag – Best Reusable Wet Bag for Travel

The Bumkins Waterproof Wet Bag is the best reusable wet bag for swimmers who travel. It holds a wet swimsuit and a damp towel without leaking into the rest of your luggage, and the heat-sealed seams give it more durability than stitched competitors. I packed a wet suit in one during a 4-hour car ride and the rest of my bag stayed dry.

The snap handle is a small touch that makes the bag more useful: hook it to a stroller, gym bag, or the outside of a backpack. The fabric is machine washable, which matters because wet suits smell after a few uses.

Heat-Sealed Seams Explained

Heat-sealed seams are bonded with heat and pressure rather than stitched. Stitched seams have needle holes that water can seep through over time. Heat-sealed seams are continuous, which is why the Bumkins outperforms stitched bags in our wet-gear test.

Use Cases Beyond Swimming

Bumkins markets the bag for cloth diapers and pump parts, but the same waterproofing works for any wet gear. Swimmers use it for damp suits, snorkelers for wet rash guards, and travelers as a laundry bag. The versatility makes it a strong value if you want one bag that does double duty.

What the Bumkins Cannot Do

Like the ALVA, this is a wet gear bag, not a submersion-rated dry bag. Use it to transport wet items, not to protect valuables underwater. Pair it with a phone pouch or roll-top dry bag if you need full submersion protection.

How to Choose the Best Waterproof Bag for Your Swimming Style

Choosing the best waterproof bag for swimming comes down to four decisions: what rating you actually need, what closure type works for your activity, how much capacity your swim session demands, and how the bag affects your swimming form. Below is the framework our team uses when matching a bag to a swimmer.

Understanding Waterproof Ratings (IPX7, IPX8, IP67, IP68)

IP ratings are the international standard for water and dust protection. The first digit after “IP” is dust resistance (0 to 6); the second is water resistance. For swimming, focus on the second digit:

IPX7 means the bag survives temporary submersion in up to 1 meter of water for 30 minutes. IPX8 means continuous submersion beyond 1 meter, with the exact rating set by the manufacturer. Some IPX8 bags are rated to 10 feet, others to 100 feet. For most swimmers, IPX7 is enough. For snorkelers and free divers, IPX8 gives extra margin.

For your phone, an IPX8 pouch is the right call. Bags with a true IP67 or IP68 rating (dust-tight plus water protection) are typically heavier and more expensive, designed for electronics cases rather than fabric dry bags.

Closure Types Compared (Roll-Top vs Zipper vs Magnetic)

Three closure types dominate the category. Roll-top closures use folds and a buckle to create a watertight seal. They are simple, field-repairable, and the standard for serious dry bags. The downside is they need three full folds to be truly waterproof. Skip a fold and water finds the seam.

Zipper closures use a waterproof zipper (HydroLok, TRU Zip, or ZipDry). They are faster to open and close than roll-tops, which matters if you need to grab your phone mid-session. The downside is zippers can fail at the seam, and they are harder to repair in the field.

Magnetic closures are rare in true waterproof bags because magnets do not create reliable seals under pressure. Avoid “magnetic waterproof” claims from unfamiliar brands.

Capacity by Activity (Pool vs Beach vs Open Water vs Multi-Day)

Match the bag size to your activity:

2L to 5L: Phone and small valuables for lap sessions, snorkel trips. Best as a personal item, not a gear hauler.

10L: Towel, change of underwear, keys, phone. The most popular size for general swimming and beach trips.

20L: Full change of clothes plus towel plus a small toiletry pouch. Good for day trips and post-swim commuting.

30L to 40L: Multi-day swim or kayak camping. Holds clothing, sleeping layer, food, and water.

55L and larger: Overkill for swimming alone but useful if you are hauling gear for multiple swimmers or a long expedition.

Material and Construction (Welded Seams vs Stitched, TPU vs PVC)

Welded seams are stronger than stitched seams for waterproofing. Stitched seams have needle holes that water can seep through. All ten bags on this list use welded or heat-sealed seams.

TPU (thermoplastic polyurethane) is lighter and more flexible than PVC. PVC is heavier but more abrasion resistant. Both are genuinely waterproof. Choose TPU if you prioritize packability and weight; choose PVC if you drag your bag across rocks.

Swimming Form and Buoyancy Considerations

An air-filled dry bag floats, which sounds great until you try to swim with one strapped to your back. The trapped air pulls your hips out of alignment during freestyle and breaks your body position. The fix is to leave a small gap when rolling the top, then press out excess air before the final buckle. The bag then sits neutral in the water and stays out of your way.

For waist packs and phone pouches, buoyancy is less of an issue because they sit close to your body and do not affect stroke mechanics. If form matters more than capacity, a flat-profile fanny pack like the AiRunTech is the smarter choice than a 10L roll-top backpack.

Phone Protection While You Swim

For pool swims and beach days, a dedicated IPX8 phone pouch is the lightest and least obtrusive option. The Hiearcool and JOTO pouches on this list both keep phones safe for the price of a meal out. If you need to shoot video through the pouch window, choose a brand with clear windows on both sides like JOTO.

For saltwater or prolonged sessions, rinse it with fresh water after use. Salt corrodes plastic windows and seam adhesives over time. A quick freshwater rinse and air dry will double the life of any pouch.

Frequently Asked Questions

Final Verdict: Picking the Right Waterproof Bag for Swimming

After 45 days of submersion testing, swim-form testing, and durability checks, the MARCHWAY Floating Dry Bag Backpack is our editor’s choice for the best waterproof bag for swimming. It combines welded seams, genuine floating capability, a wide size range, and the most useful D-ring of any bag in this roundup. If you want the best value with a phone case included, the Earth Pak is the smarter buy. If you only need to protect a phone and a few keys, the Hiearcool pouch is hard to beat at its price point.

For pool commuters who prioritize drying speed over sealing, the TYR mesh backpack is the right tool. For families who need wet and dry separation, the ALVA or Bumkins wet bags solve that specific problem – and if you are a swim parent looking for a bigger parent-facing carrier, our best diaper bag backpacks for dads guide covers the top picks. For snorkelers who want to shoot the reef on the same trip, our best waterproof digital cameras for kids roundup pairs nicely with the JOTO pouch above. Match the bag to your activity, check the IP rating, and you will end up with gear that protects your valuables and stays out of your way in the water. Take care of it with a freshwater rinse after saltwater sessions, and it will serve you well through 2026 and beyond.