Bluetooth dies the moment your head goes under. Waterproof headphones for swimming still have to hear the lane.

The song that vanished at 15 metres

Splash-proof is not swim-proof. An IPX7 bud might survive a sink. It does not carry a 2.4 GHz radio through chlorinated water. The phone on your kit bag might as well be in another building the moment your head goes under.

SHOKZ is unusually honest about it. The US OpenSwim Pro FAQ asks whether you can use Bluetooth mode underwater, and answers no. Water disrupts the signal. Underwater listening is MP3 mode with files already on the band. The UK page says the same: only MP3 mode works underwater because water blocks Bluetooth. If a shop assistant tells you otherwise, they are selling you a deck toy.

I would rather you spend nothing and count lengths in silence than buy waterproof Bluetooth that dies on the first length. The product that works is boring. It is storage, or a transmitter sitting on a chair.

The sound sits on the bones, not in the canal

A swim headphone that lasts is almost always a U-shaped band. Transducers sit in front of the ears and shake bone. The canal stays open. SHOKZ and Zygo both sell that idea. It is why you can, in theory, still hear a whistle. It is also why a loud mix plus the earplugs in the box is how people miss a tap on the foot.

Open ears are not a manners licence. Bone conduction leaks at high volume. The person in the next lane gets a tinny chorus whether they asked for it or not. Turn it down. If you need isolation, use the plugs they packed, and then watch the lane twice as hard, because you have just muffled the world you were supposed to stay aware of.

Fit is a cap-and-goggles problem, not a fashion one. SHOKZ says put the band on first, then pull the cap over the hooks. If it slips on a tumble turn, you bought a toy. If it stays put and you still cannot hear the coach, take it off. The set on the whiteboard is the session. The soundtrack is a hobby riding along.

Three ways music gets to a swimmer

There is no clever fourth option in 2026. You are choosing a pipe.

Files on the band. You rip tracks you already own, drag them onto a disk that appears when you plug in the magnetic cable, and push off. Spotify on the phone does nothing once you are under. SHOKZ OpenSwim has always been this product. OpenSwim Pro is this product too, the moment you long-press into MP3 mode. It is fussy. It works at 1.8 metres. I like fussy things that work.

Bluetooth on land. Useful for the walk, the bike, the dryland room. OpenSwim Pro has Bluetooth 5.4 for that. Original OpenSwim does not, on purpose. SHOKZ used to call the ancestor AfterShokz Xtrainerz. The current names, checked on 23 August 2026, are OpenSwim and OpenSwim Pro. Do not buy OpenRun for the pool. That one is IP67. SHOKZ marks it not for swimming.

A box on the deck. Zygo's Z2 still sells this. Your phone pairs with the charging case. The case talks to the headset on a radio that is meant to travel through water. You get live podcasts. You also get a transmitter on a chair, an antenna to flip up, and a price that assumes you live where they ship.

What is still sold, with numbers from the maker

I am not scoring these. I am listing what official pages still sell today, 23 August 2026, and the water rating those pages actually print. IP numbers without a depth and a time are marketing fog. SHOKZ gives both.

OpenSwim Pro, part number S710 on the SHOKZ spec sheet dated 7 April 2026, weighs 27.3 g. Battery is up to 9 hours in Bluetooth and 6 hours in MP3. Formats on the disk include MP3, FLAC, WAV, AAC, M4A, APE, and WMA. You cannot dump a playlist onto it over Bluetooth. That is the whole point of the cable.

Original OpenSwim is simpler. 4GB, 8 hours, 30 g, seventh-generation bone conduction. Files only. If you already own a library and you only swim, land Bluetooth is an upsell. If you also run to the pool and want one band, Pro is the less annoying object. I would buy Pro for that reason, not because 32GB of podcasts will make me faster.

Zygo's own FAQ is the useful bit. Bluetooth cannot penetrate water, so they convert it. Range they quote is roughly 50 metres at about 60 cm depth in a chlorinated pool, antenna up, case elevated. Headset battery is 2 to 3 hours. Warranty is one year, US only. In a British club lane that is a lot of kit for a soundtrack.

SHOKZ is not a dive brand. OpenSwim Pro is not recommended for diving. Soak the band in fresh water for about 30 minutes after salt. Dry the magnetic port before you charge. Waterproofing is not permanent. They print that in the footnotes.

Shared-lane etiquette is the real product test

This is the section the shopping pages skip. A public lane is traffic. Music is a private habit riding in public water.

Plenty of leisure pools do not ban headphones. They ban the speaker. Mt. Lebanon's swim-centre rules say you may not play music except through earbuds or headphones, and only audible to you. Split the lane when there are two of you. Circle when there are three, on the right, counter-clockwise. Enter at the corner until the people already swimming have seen you. That is ordinary lane law. A bone-conduction band does not exempt you from any of it.

Passing still works by a tap on the foot near the wall. If a chorus occupies your skull, you will miss it. Then you are the person who stopped on the black line. Turn it down until you can still notice a hand. If you cannot, the band comes off. I would rather finish a length bored than collide with someone who thought they had the lane.

Club sessions are stricter, and they should be. If a coach is giving intervals, you need the words more than the track. Some squads ban personal audio in the water. Some leisure centres do too, so you can hear a whistle. Ask the desk. If the notice on the door says no, that is the rule for that building on that Tuesday.

If you bring a Zygo case, do not park it in the walkway. Flip the antenna where nobody will trip. Pack it the way you pack fins: out of the traffic, or leave it at home.

Solo early-morning hire in an empty lane is the easy case. Shared lunchtime public swim is the hard one. Coached mixed-ability club is usually a no unless the coach has said yes. I swim a lot of the third kind. The band stays in the bag.

How to pick, without a fake score

Start with the building, not the brand. If the club says no, you are done. If the public session allows headphones and you already own files, buy storage. Original OpenSwim is enough. If you also want the same band on the run, buy OpenSwim Pro. If you refuse to rip files, live in the US, and want Spotify in the water, Zygo is the live pipe, at $329 plus a case on the deck.

Do not buy on battery-life bragging. A club hour is nothing like 9 hours. Do not buy OpenRun or any IP55 or IP67 SHOKZ and dunk it. Those are sweat ratings. The swim SKUs are the two OpenSwim names, plus Zygo if you want the transmitter.

This page is not a training log. Headphones will not store your 200 pace, last best, or the week beside the next gala. If you came here from a shopping tab and you still do not write Tuesdays down, start with why swimmers should log training. If you want the honest split between watches, heat-sheet apps, and a diary you own, that is best swimming apps. Different job. Same sport.

FAQ