Underwater MP3 Players for Swimming: What Works Below the Surface
HoloSport Team
You push off, settle into your stroke, and hear the playlist perfectly for the first few seconds. Then your head goes underwater and the music cuts out.
The problem usually isn't the waterproof rating. It's the connection.
For reliable underwater MP3 playback, choose a device that stores and plays audio locally. Bluetooth from a phone on the pool deck becomes unreliable once the receiver is submerged. The right setup depends on secure fit, accessible controls, file compatibility, and whether you want a music-only player or goggles that combine audio with swim feedback.
Table of Contents
Why Bluetooth Audio Cuts Out Underwater
Bluetooth works well through air, but water absorbs the 2.4 GHz radio signals used by most Bluetooth devices. A connection that sounds fine on deck can begin breaking up as soon as the headphones pass below the surface.
That is why many swimming headphones with Bluetooth still require a separate MP3 mode for underwater use. Music files are stored on the headset or player, so playback doesn't depend on maintaining a connection with a nearby phone.
Bluetooth can still be useful for running, cycling, gym sessions or listening before you enter the pool. It just shouldn't be the foundation of an underwater listening setup.
For more detail, see our guide to listening to music while swimming without it cutting out.
The Main Types of Underwater MP3 Players
There isn't one design that suits every swimmer. Most products fall into three useful categories.
Bone-Conduction MP3 Headphones
Bone-conduction headphones sit near the cheekbones and send vibrations through the bones around the ear. Many swimmers prefer this approach because there are no speakers inside the ear canal.
The design still has to stay in position during push-offs and turns. A swim cap, goggle strap or individual head shape can change where the transducers sit. Some manufacturers also recommend earplugs in the water to improve perceived clarity.
The Shokz OpenSwim Pro is an example of this category. Its official specifications list 32GB of storage and separate Bluetooth and MP3 modes. MP3 mode is required underwater, while Bluetooth is intended for activities above the surface.
This style makes sense when you want one headset for swimming and dry-land training. It does not provide goggles or swim metrics, so those remain separate purchases.
Separate Waterproof Players and Earbuds
A small clip-on swimming MP3 player is the most familiar arrangement. The player attaches to a goggle strap or swimsuit, while waterproof earbuds sit in the ears.
This lets you keep goggles that already fit. It can also make replacing one part of the setup easier. If the earbuds wear out, for example, you may not need to replace the player.
The drawback is the extra hardware. Cable length, clip location and earbud seal can all become irritating during a long set. A system that looks tidy on deck may shift when you push hard from the wall.
Choose this type only after checking where the player attaches and whether you can reach its buttons with wet hands.
Swim Goggles With Integrated Music
Integrated goggles combine vision and audio in one unit. Some models also add lap tracking, voice prompts or post-swim data.
This removes a separate player, clip and cable from the setup. It also makes fit more important. The goggles must seal properly, remain stable and keep the audio components in a comfortable position at the same time.
SollaWave smart swim goggles with music take this integrated approach. They combine goggles, underwater headphones, local music playback, swim tracking and anti-fog protection. During a pool session, voice feedback can report metrics such as time, distance, laps, pace, SWOLF and stroke information. SWOLF combines lap time and stroke count to help swimmers observe efficiency trends.
This arrangement is better suited to swimmers who want music and workout feedback together. Someone who only wants basic playback may find a standalone player easier.
What to Check Before Buying an Underwater MP3 Player
A large storage number is easy to compare. The details that decide whether you will keep using the device are less glamorous.
Check the Music-Transfer Workflow
Most underwater MP3 players need locally stored files transferred from a computer. Before buying, find out:
- Which operating systems are supported
- Whether the device appears as a normal USB drive
- Which audio formats it accepts
- How playlists and folders are organized
- Whether a special cable is required
A downloaded Spotify or Apple Music track is not necessarily a transferable audio file. Subscription downloads are often protected and intended to remain inside the streaming app.
Do not assume that offline playback means you can copy the file to any swimming MP3 player.
Test the Controls With Wet Hands
You should be able to find play, pause, volume and track controls without looking at them. Small buttons that feel obvious at a desk may become awkward once you are wearing goggles and a cap.
Think about when you will use the controls. Changing volume during a rest interval is easy. Searching through a complicated menu halfway down the lane is not.
Put Fit Ahead of the Spec Sheet
A player has to remain stable during streamlined push-offs, flip turns, fast stroke-rate work, cap adjustments and longer continuous swims.
For in-ear systems, ear-tip size and seal affect comfort and sound. For bone-conduction products, transducer position matters. With integrated goggles, both the seal and audio position need to work for your face.
An in-water fit test tells you more than trying the equipment while standing in a changing room.
Match Battery Life to Your Real Sessions
Compare the stated operating time with your normal workout length, including the time before and after the swim. Check whether different playback modes have different battery figures.
More battery life is useful, but a clear charging routine may matter more if most of your sessions last under an hour.
Decide Whether You Need Swim Data
If music is the only requirement, a dedicated player or bone-conduction headset may be enough.
If you also want lap information and spoken workout feedback, an integrated system can reduce the number of devices you carry. That convenience comes with more setup and a greater dependence on the fit of one product.
How SollaWave Handles Underwater Music
SollaWave plays music from files stored on the goggles rather than streaming from a phone underwater.
The basic workflow is straightforward:
- Connect SollaWave to a computer with the supplied magnetic data cable.
- Open the USB drive shown as
SollaWaveorSW ES1. - Transfer compatible local audio files.
- Organize the tracks into folders or playlists.
- Select a playback mode before swimming.
The physical controls remain available during a workout:
- Press the power button to play or pause.
- Use the
+and-buttons to change the volume. - Double-press
+or-to move to the next or previous track. - Choose Repeat All, Shuffle or Repeat One.
The playlist system includes All Songs, Local Folder and Virtual Playlist options. Each playlist can contain up to 500 songs, with support for up to 10 custom playlists and 10 folder playlists.
This is useful for swimmers who divide their audio by session type. A steady endurance playlist can stay separate from shorter interval tracks, podcasts or technique-session audio.
SollaWave Audio-Format Compatibility
SollaWave supports MP3, AAC, FLAC, WAV and WMA files. HoloSport compatibility testing covered the following combinations:
These tested combinations do not guarantee compatibility with every encoder, bitrate or file container. DRM-protected downloads from streaming services cannot be treated as ordinary transferable music files.
If a track fails to import or play, check its actual format and protection status rather than relying only on the filename extension.
SollaWave or a Separate Underwater MP3 Player?
Choose SollaWave if you want:
- Goggles, local music and swim feedback in one system
- Fewer separate pieces of equipment around your head
- Physical playback controls during a session
- Playlists and spoken swim metrics
- Post-swim workout information in the HoloSport app
Read a swimmer's hands-on SollaWave review for a closer look at the integrated experience.
Choose a separate MP3 player or bone-conduction headset if:
- You already own goggles that fit particularly well
- You want music without swim tracking
- You want to use the same headphones for land training
- You prefer to replace the goggles and audio equipment independently
- A simpler or lower-cost arrangement matters more than integration
SollaWave also has real tradeoffs. You need a computer and compatible local files to prepare the music library. It does not stream Spotify directly underwater. The combined system only makes sense if its goggle and in-ear fit work for you.
Neither approach is universally better. The right one removes friction from the kind of swimming you already do.
A Practical Pre-Swim Checklist
Before getting into the pool:
- Confirm that the intended files play correctly.
- Select or organize the playlist.
- Charge the device.
- Put on your cap and goggles, then test the controls.
- Check the fit during a firm push-off.
- Set the volume before starting the main set.
- Keep it low enough to hear coaches, whistles and nearby swimmers.
For open-water sessions, music should never replace sighting or environmental awareness. You still need to notice boats, other swimmers, instructions and changing conditions. Leave enough attention for the water around you.
Frequently Asked Questions
Can Bluetooth headphones work underwater?
Ordinary Bluetooth connections become unreliable once the receiver is submerged. Some swimming headphones include Bluetooth for use on land, but switch to locally stored MP3 files for underwater playback.
Can I listen to Spotify while swimming?
Direct streaming from a phone on deck is generally unreliable underwater. Some specialized devices may support authorized offline app playback, while many swimming players require transferable local files. Spotify downloads cannot normally be copied from the app as standard MP3 files.
What audio format is best for a swimming MP3 player?
MP3 is a practical choice because it is widely supported and produces relatively small files. The best format is still one your device explicitly supports. Check compatibility before converting or transferring a large music library.
Are bone-conduction headphones better for swimming?
They can be more comfortable for swimmers who dislike in-ear speakers, but they are not automatically better. Head shape, cap pressure, transducer position, controls and underwater sound preference all affect the experience.
Can I use an underwater MP3 player in open water?
Yes, where local rules permit it, but keep the volume conservative. Music must not prevent you from hearing instructions, boats or other environmental cues, and it should never replace an open-water safety plan.
Choose the Setup You Will Actually Use
If you only want dependable music, start with a dedicated waterproof player or bone-conduction headset that stores files locally.
If you would rather combine your goggles, underwater music and spoken swim feedback, SollaWave offers that integrated route. Review its file workflow, controls and fit before deciding whether one combined system suits your training.
You can also compare the practical difference between swimming with music and swimming without it before adding another device to your pool bag.