The worst freediving day of the year rarely happens in the water. It happens at 6 a.m. in a hotel car park, when you unzip the fin bag and find a blade that has taken a new shape, a wetsuit that smells like a swamp, and a dive watch with a screen that now looks like frosted glass. The trip is booked, the boat leaves in forty minutes, and nothing you own is where, or how, you left it. 🤿
Freediving is the lightest kind of diving, and that is exactly why its gear is so easy to underestimate. There is no tank, no regulator and no heavy BCD. A whole kit fits into one long bag: fins, a mask, a snorkel, a wetsuit, a weight belt, a lanyard and a watch or computer. But "light" does not mean "tough". Long fin blades are stiff in one direction and fragile in another. Neoprene hates heat and folding. Silicone hates sunscreen and sun. Small electronics hate salt, and a phone or a car key hates the boat deck even more. Most of the damage happens before you ever get wet: in the packing, in the hold, in the minibus and on the pier.
This guide goes through ten ways freediving gear gets wrecked on the way to the blue, in the order the trip unfolds: at home, in transit and at the water. Each one comes with a fix that costs little or nothing. Some of the fixes involve a small hard case, and we sell those, so we will say plainly where a plain dry bag or a towel does the job better. Wherever a rule depends on the airline, the country or your insurer, we tell you to check the source rather than guess, because those rules change faster than any article can. The text is written for European travellers heading to the usual freediving places: Mediterranean islands, the Red Sea, the Canaries, the Azores and further afield. ✈️
🧳 Before you leave: the packing mistakes
1. Fins packed at the bottom, under everything else
Fins are the longest and most expensive single item in a freediving bag, and they are usually packed first, which means they end up at the bottom with the rest of the bag on top. That is the wrong way round. A long blade, whether it is plastic, fibreglass or carbon, is designed to flex along its length under a smooth load in the water. It is not designed to carry a weight belt, a wetsuit and two litres of sunscreen sitting on one corner for twelve hours in a pile of baggage.
The result is rarely a dramatic break. It is a slight warp that you only notice on the second dive, a chipped edge on the blade tip, or a foot pocket that has been squashed out of shape. Carbon blades are very stiff and very strong in normal use, but they can chip or delaminate on a hard point impact, and an edge knocked against a corner on a luggage belt is exactly that. Plastic blades are more forgiving but can take a permanent bend if they are stored under load or in the heat.
The fix is a matter of order and support. Fins go in last and on top, or in a dedicated fin sleeve or bag that holds the blade flat. Many modern freediving fins have removable blades, which makes a big difference to bag length. If yours do, take them apart. Support the blade along its length with a rolled towel or a piece of foam, and never let anything with a sharp corner, such as a camera housing or a knife in a sheath, lie against it. If you are travelling on a budget and the hold is the only option, a long stiff tube or a rigid sleeve is cheaper than a new pair of fins.
2. A wetsuit that goes into the bag damp
Neoprene is a closed-cell foam, and it holds a surprising amount of water. A suit that went into the bag at the end of the last trip, or after a quick rinse that was not followed by proper drying, will not just smell. Bacteria and mould will start working on the lining and on the seams in a closed bag within a day or two, and a hot hold or a warm minibus speeds that up. The smell is the mild end of the problem. At the other end, damp neoprene stored tightly can bond to itself and degrade at the creases.
The routine that wetsuit makers and dive shops recommend is simple: rinse in fresh water after every salt-water session, turn the suit inside out and dry it in the shade, never in direct sun, and hang it over a wide hanger or drape it over a rail rather than a thin wire. Sun damages neoprene and fades the print. Before you pack, it should be completely dry on both sides, including the inside of the sleeves and legs. Fold it along natural lines, not in tight, sharp creases, and put the thick, soft items next to it so that it is not pressed into a hard fold.
On the way back, the real test comes. Few people have a dry place to hang a suit at the end of a long day, and many put it away wet, intending to rinse it at home. If you must, use a large, breathable bag, not an airtight one, and take it out at the first opportunity. A wet suit in a sealed plastic bag for three days is how a good suit becomes a bad one.
3. Mask and snorkel crushed, scratched or sun-baked
The mask is the one item you cannot replace by borrowing, because a mask that does not fit your face leaks. It is also easy to damage. Tempered glass will survive a lot, but a mask thrown into a bag with a weight belt gets scratches on the lens and tears at the skirt. A silicone skirt left on a hot dashboard or a hot boat deck for a day can harden and lose its seal. Sunscreen and oil from the skin also slowly degrade silicone, which is why a mask that is a few seasons old suddenly seems to leak.
The standard answer is a hard mask box. A rigid box, even a cheap one, protects the lens and the skirt. Pack the snorkel separately: the mouthpiece is a soft part and the purge valve, if there is one, is a small mechanical item that does not like being bent. Take a spare strap and a spare mouthpiece. A strap can snap on the first morning, and replacing it takes a minute if you have one, and an hour if you have to find a shop. In low-visibility conditions, a defog solution or a small bottle of baby shampoo, which many freedivers use, can save the first dive.
If you wear prescription lenses or have one very specific mask, treat it as irreplaceable and carry it in your cabin bag, not the hold. The same applies to anything that is hard to get on a small island: a particular size of mouthpiece, a nose clip, ear plugs.
4. A dive computer or watch that arrives scratched, flat or lost
Freedivers rely on a small wrist computer or a watch with a depth gauge for safety as well as logging: depth alarms, surface-interval timers and dive records. Those instruments are among the most expensive items in the kit, and also the smallest. They are lost in pockets, scratched on the zip of a bag, or arrive flat on the first morning because no one charged them.
The glass is the vulnerable part. A sapphire or mineral crystal copes with salt water well, but it still scratches against sand and hard edges, and a plastic screen scratches more easily. A freediving computer loose in a bag with a weight belt will show it by the end of the week. A small padded or hard case, in the cabin bag and not the hold, solves the problem and keeps the charger with the device. Check the charging cable too. Many computers use a proprietary clip or cradle, and a missing cable is a good deal harder to replace than the watch.
Before you fly, update the firmware and check the battery, because you do not want to do it on a slow hotel connection. Note the serial number and keep your dive log backed up, so that if the device is lost, the history is not lost with it.
✈️ In transit: airport, hold and transfers
5. Weights packed so that they punish everything else
A weight belt with lead, or a set of neck or ankle weights, is dense, hard and sharp-cornered. In a soft bag it is a hammer that moves around inside every time the bag is dropped or thrown onto a belt. It is also the single item most likely to push a bag over the airline weight allowance, which for checked baggage is commonly in the range of twenty to thirty kilograms depending on the airline and the fare.
There is a simple answer for most trips: do not take lead. Most dive centres and boats that run freediving trips supply weights as part of the hire, and lead is heavy and cheap enough locally that carrying it across Europe makes little sense. If you do bring a belt, because you have your own, pack it at the wheel end of the bag, tightly wrapped in a towel, and away from the fins and the electronics. Do not put it in a bag with a thin back panel, because it will push through under impact.
Check the allowance and the sports-equipment policy of your airline before you go, rather than at the check-in desk. Our article on how to check in sports equipment for a flight covers the general logic of how airlines treat bulky items and how to avoid the fee surprises that come with them.
6. Lithium batteries in the wrong bag
A modern freediving kit has a surprising number of lithium batteries: the dive computer, an action camera or two, a torch, a power bank, a phone, a GPS tracker for the buoy, a pair of electronic earbuds. The rules for lithium batteries on aircraft follow the same principle across most airlines and regulators: spare batteries and power banks go in the cabin, not in the hold, with the terminals protected against short circuits, and the allowed watt-hour rating is limited. The exact limits and the number of spares are set by the airline and the aviation authority, so read the current rule on the carrier's own site before you pack, not a forum post from three years ago.
The practical advice is simple. Put every spare battery and power bank in your cabin bag. Tape over the contacts of loose cells or keep them in their original packaging or a small battery case. Do not leave a camera with a battery in a bag that will be squashed in the hold. A swollen or punctured lithium cell is not a minor problem, it is a fire risk, which is why the rules exist.
A small hard case with a foam or divider insert is a good place for this kind of kit, because it keeps the cells from touching each other or loose metal, and it keeps the charger and cables in one place. A Peli 1150, for example, takes a camera body, a few batteries, cards and a charger with room to spare.
7. Salt, sand and sunscreen in the zips and seals
Gear that has been in salt water carries salt crystals when it dries. Those crystals sit in zips, in the teeth of a buckle and in the seam of a bag. The next time you open the bag, they grind. A salt-clogged zip is the commonest cause of a fin bag failing in the middle of a trip, and sand does the same job in a quarter of the time. Sunscreen adds a layer of grease on which both stick.
Rinse everything in fresh water at the end of each day: the bag as well as the gear in it. Open zips and let them dry. Run a dry brush or an old toothbrush along the teeth. A little silicone lubricant, or wax for a zip, keeps it moving for the next dive. For hard cases with a seal, the same principle applies to the O-ring: a gritty or dry seal is a leaking seal. Wipe it with a clean cloth, check it for sand and hair, and, if it is dry, apply a very thin film of silicone grease, as the manufacturer recommends. Spare O-rings and valves are available in our spare parts collection, and they cost less than a ruined phone.
The mistake we see most often is not neglect but over-enthusiasm: a thick layer of grease on a seal collects grit and does more harm than none. Thin and clean is the rule.
Grab & go: small waterproof cases for the pier, the boat and the beach
🌊 At the water: boat, beach and pier
8. Phone, keys and papers left to the spray
The boat deck or the pier is the most hostile place for a phone in the whole trip. Spray lands on it, a wave rocks the boat, and the phone ends up under a wet towel. Keys sit in a trouser pocket that is soaked within an hour. A car key fob with a battery inside does not survive immersion in salt water. A phone that is "water-resistant" is rated for a short immersion in fresh water, not for a day of salt spray, and the charging port is the first thing that corrodes.
The common solution is a pouch or a dry bag, and a dry bag is often the right answer for a towel, a change of clothes and a sandwich. But a soft pouch does not protect against being sat on, crushed under a weight belt or dropped on the deck, and the roll-top closure can leak if it is not folded precisely. A small hard case does something different: it keeps the phone, the key, a bank card and a few banknotes dry and flat, closes with one hand and, with light contents, usually floats if it falls over the side. Our article Waterproof case or dry bag? 9 situations where only one of them works goes through where each wins.
Think about the papers too. A photocopy or a photo of your passport, your insurance policy number and an emergency contact, kept in the same case as the key, make a bad day at the pier a minor one. This matters for another reason: many standard travel-insurance policies treat freediving as a specialist activity, and some exclude it unless you buy an extension. Check the wording of your own policy, and carry the policy number and the assistance phone number where you can read them.
9. Action cameras and memory cards that vanish
Underwater footage is half the reason many people freedive, and cameras suffer at every stage. A housing with a dry O-ring and a hair on the seal floods. An action camera without a housing, used beyond its depth rating, floods. A camera left in the sun on a boat deck overheats, and a cold, wet camera taken into a warm car fogs inside. Sand on a touchscreen scratches it in a day.
The nastier loss is the data. Cards are tiny, and a microSD card that falls out in a boat is gone. A card in a pocket gets washed. Many divers buy one big card and fill it, when two or three smaller cards, swapped each day and kept in a case, spread the risk. Label the cards, and put the full ones into the case at once, so you never confuse a full card with an empty one. Back up to a phone or a small SSD in the evening, and do not format a card until you have checked that the copies open.
We covered housings in detail in What survives a capsize, and the same logic applies on a freediving boat: anything you cannot afford to lose belongs in a closed case, not in a pocket. For the broader question of why "waterproof" claims on spec sheets mean less than you think, read what IP67 actually means for your Peli.
10. Heat: gear cooked in a car, on a deck or in a bag in the sun
The last mistake is the quietest. In summer in the Mediterranean, and in the Red Sea at almost any time of year, a closed car in the sun can reach temperatures at which silicone softens, adhesives creep, lithium batteries swell and neoprene degrades. A black bag on a boat deck is not far behind. You will not see the damage on the day. You will see it as a mask that leaks the next season, a computer that loses battery capacity too fast, or a fin foot pocket that has gone soft.
Keep the kit in the shade, in a ventilated bag in the footwell rather than the boot, and never leave electronics in a closed vehicle. On the boat, use a cool box or a pale-coloured case in the shade. A hard case with a reflective or light colour, and nothing electronic loose on the deck, is a better bet than a dark bag. Do not store batteries fully charged in a hot place for days, and do not charge them in the sun.
If you are travelling in winter to colder places, the opposite applies: cold batteries lose capacity quickly and condensation forms when cold gear moves into a warm room. Let the case warm up to room temperature before you open it, so that condensation forms on the outside of the case and not on the camera inside.
Bigger cases for the journey: fins, wetsuits and the kit that goes in the hold
✅ The freediving travel checklist
At home, a week before:
- Check the airline's baggage and sports-equipment rules, and the lithium-battery rule for the exact carrier and fare.
- Check that your travel insurance covers freediving, and note the policy number and the assistance phone number.
- Charge and update the computer or watch; check the strap and spare batteries.
- Check the fin foot pockets, mask skirt and snorkel mouthpiece for cracks and hardening; replace worn parts now.
- Make sure every item is completely dry on both sides before it goes into a bag.
In the cabin bag:
- Computer or watch, charger and cable, in a small hard case.
- Spare batteries and power banks, with the contacts protected.
- Mask, if prescription or hard to replace, plus a spare strap.
- Memory cards, in a labelled case.
- Passport copy, policy number and emergency contact.
In the hold:
- Fins, with the blades supported flat and on top of the load.
- Wetsuit, dry, folded along natural lines.
- Weights, only if you must, wrapped and at the wheel end.
- Rinse kit: a small bottle of fresh-water rinse aid, a brush, silicone lubricant for zips and seals.
At the water:
- Phone, keys, card and cash in one small hard case.
- Cards and camera in a case, not in a pocket.
- Everything in the shade, and nothing electronic left in a closed vehicle.
- Rinse and dry the gear at the end of the day, not at the end of the week.
❓ Frequently asked questions
Can I carry my fins in cabin baggage?
Sometimes. Short fins or a pair with removable blades may fit the airline's cabin allowance, but long freediving fins usually do not. Dimensions and weight limits are set by each airline, and they differ between fares, so check before you book. The safest approach is to carry the fragile and irreplaceable items in the cabin, such as the computer, the mask and the batteries, and to protect the fins in a rigid sleeve or a case in the hold.
Is a hard case better than a soft fin bag?
For long fins, a purpose-made fin bag or a rigid tube is the right tool, because a blade needs support along its length. A hard case earns its place for everything else: computers, cameras, cards, batteries, phone and keys, and for the checked bag that holds a wetsuit and accessories. A case with a seal and a pressure valve will also keep the contents dry if the bag sits in a puddle on the apron or in the boat.
How do I stop a wetsuit from smelling?
Rinse it in fresh water after every session, dry it inside out in the shade and store it on a wide hanger. A wetsuit shampoo helps, but drying is the main thing. Do not pack it damp, and do not leave it in a sealed bag. If it already smells, wash it in a dedicated wetsuit cleaner as the manufacturer recommends and air it thoroughly.
Are batteries really that much of a problem?
They are the reason most airlines have written rules about devices. The risk comes from damaged or short-circuited lithium cells, which is why spare batteries and power banks go in the cabin, protected against short circuits. Following the rule takes five minutes, and ignoring it can mean confiscation at the gate or worse.
Do I need a Peli case to travel with a dive computer?
No. A padded pouch will do for a short trip. A hard case is a good idea when you carry several items that should not touch each other, such as a computer, a camera, spare batteries and cards, or when the case will live on a wet boat. The right size is the smallest case that holds the kit without rattling; a Peli 1010 or 1060 is enough for a watch and a phone, and a Peli 1150 or 1200 holds a camera with accessories.
🏁 In short
Freediving gear is light, and it is easy to treat it that way. But a long blade, a damp suit, a tired silicone skirt, a small lithium battery and a phone on a wet deck all share one weakness: they get damaged in the hours around the dive, not in it. Pack in the right order, dry everything, keep the batteries with you, rinse the salt, protect the small and expensive items in a case and keep the lot out of the heat. Do those six things, and the morning in the car park will be the morning you reach the blue with every piece in working order. 🤿
If you want a deeper look at trip planning, our dive trip packing list and the guide to the 10 best diving destinations in Europe are good next reads. For small cases, browse the small protective cases collection, and for the hold, our travel suitcases. If you are not sure which size fits your kit, send us a list of what you carry and we will tell you.
