(Formerly Xtrainerz)

Waterproof Bone Conduction
MP3 Headphones
Designed for Swimming
*No Bluetooth
£139.00 Regular price
Unit price  per 
£139.00 Regular price
Unit price  per 

OPENSWIM(Formerly Xtrainerz)

£139.00 Regular price
Unit price  per 
OpenSwim takes open-ear listening to new depths. The IP68 waterproof design withstands total submersion in up to 2 metres of water. With up to 8-hours powerful battery life and 1200 songs storage, you can continuously enjoy the extraordinary underwater sound quality. It’s the unbeatable choice for swimming.
OpenSwim takes open-ear listening to new depths. The IP68 waterproof design......
4 GB of MP3 Storage
(Up to 1200 songs)
8-Hour Battery Life
IP68 Waterproof
(For swimming)
Comfortable Under Swim Cap
£139.00 Regular price
Unit price  per 
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4 GB of MP3 Storage
(Up to 1200 songs)
8-Hour Battery Life
IP68 Waterproof
(For swimming)
Comfortable Under Swim Cap
24-Month Warranty
Free 2-3 Business-Day Delivery
30 Days Return & Refund
24-Month Warranty
You will enjoy a 24-month warranty period from the purchased date with any products here
Free 2-3 Business-Day Delivery
Orders will be dispatched within 2 business days. The parcel will arrive at your address in 48 hours once shipping out.
30 Days Return & Refund
30-day return & refund window is available for you if you aren’t satisfied with your purchase here for any reason.
Awards For OpenSwim(Formerly Xtrainerz)
2020 IF Design Award
2019 & 2020 CES Innovation Award
Bone Conduction
MP3 Headphones.
Open-Ear Listening
Our open-ear design powered by bone conduction technology ensures bud-free and comfortable listening all day, in or out of the water.
Bone Conduction Technology
Equipped with the patented PremiumPitch™2.0 bone conduction technology, OpenSwim(Formerly Xtrainerz)achieves 50% less sound leakage, and provides extraordinary underwater sound quality.
IP68 Waterproof
An IP68 waterproof design withstands total submersion in up to 2 metres of water. It’s fully waterproof and submersible so you can swim, run, cycle, or train harder than ever before.
8-Hour Battery Life
Designed to go the distance. Powerful battery enables a premium audio experience for up to 8 hours.
4GB of MP3 Storage
Built-in storage allows for a library of up to 1,200 songs, ready to play at the touch of a button, enough to store all the music you enjoy.
Versatile And Secure Fit
Compatible with swim caps, goggles and earplugs. OpenFitTM titanium design equipped with wraparound flexibility for reliable stability in any situation.
Built-In MP3 Headphones
It supports MP3, WAV, WMA, AAC, and FLAC for
device-free listening.

Music Shines Underwater

Experience underwater music like never before

What’s In The Box

OpenSwim(Formerly Xtrainerz) MP3 Headphones
Silicone Carry Case
USB Charging Cable
Swimming Earplugs


PremiumPitch™ 2.0
Stereo Sound
Powerful bass and
higher volume
Supports MP3, WAV,
Weighing just over 1oz
for all-day comfort
Battery Life
8 hours
Charge Time
2 hours
Standby Time
Up to 10 Days
Charging Port
Pogo Pins
Battery Capacity
183 mAh
Maximum Charging Voltage
5.25 V
Bluetooth Versions
Internal Music Storage Only
4GB Of Memory
Mutipoint Pairing
Wireless Range
Compatible Codecs
Compatible Profiles
Sweat & Water Resistant
IP68 Waterproof
Full Titanium
Moisture Detector
Command Controls
Mode button, Power button, Volume button
Frequency Response
96 ± 3dB
Microphone Type
Microphone Sensitivity
Find The Right Headphone For You
Swimming MP3
No Bluetooth
Bluetooth 5.1
Battery Life
8 Hours
8 Hours
Water Resistance
Waterproof, for swimming
Waterproof, against rain

Expert Reviews

“They’re not cheap, but these are the most complete, high-tech waterproof headphones on the market. The sound is bone-conducted from beside your ear, preventing the risk of swimmer’s ear and other potential plugged-ear problems.”
“Perfect for swimmers in particular, the Aftershokz Xtranierz are an appealing set of bone-conducting headphones. We just wish they had Bluetooth connectivity for those out of the pool times.”
" Sound is incredible underwater thanks to a dedicated swimming EQ, with the bone-conduction pads sitting on your cheekbones and the ear-hook design resting comfortably under a hat or goggles. "

Customer Reviews

Based on 76 reviews
Swim headphones

Bought for my husband's birthday and he absolutely loves them. It's the first EVER that I've found a piece of technology that he hadn't heard of! And it combines two things he loves - swimming and music.
Positives - They are so comfortable to wear, easy to use and charge, stylish and simple. The sound quality is excellent and completely amplified when they're underwater.
Potential areas for improvement - They won't take an ordered playlist so everything goes into alphabetical order (the Bluetooth on the newer version may help with this). It's just music on a loop so if you want a specific track you have to scroll all the way through to find it (if you've got all 4GB filled that could be a lot of scrolling! Better controls could help but then it takes away from the simplicity). My husband has also said they fell off when he kicked off from the wall too hard (although maybe this is specific to him and he has a small head) but possibly an issue if you are on the smaller side.
All in all, he loves them, is raving about them to others and will swim for longer to listen to more music so it's a birthday present win.

Alexandra M.
Complete Game Changer

These headphones have been a complete game changer for me. From the moment I put them on, to the moment I took my first stroke I was blown away. Hearing music underwater is just a completely amazing phenomenon. The music quality is clear, the usability is easy and the whole experience completely changes my enjoyment of swimming.

As someone training for a Marathon Swim, I was looking for something to spice up my pool time and these have done just that and more. I will never look back and cannot recommend these more! Don't delay - BUY BUY BUY.

Morag M.
Perfect for running too!

Absolutley perfect for running, I have never found headphone that will stay in my ears without constant adjustment or simply falling out. These stay on because they're not in the ear, the sound quality is crisp and clear. The added benefit is it's easy to talk to people you meet while out and I feel safer running on my own listening to music as I know I'll would still hear someone coming up behind me...unless I have them turned up really loud of course! I also love that I don't have to have my phone with me, one less thing to carry. Being outside the ear means I don't get as hot as I did with over the ear headphones. They just have so many advantages I wish I'd found them sooner...I'll never go back to a tradtional set now. Thank you Shokz, so happy happy happy :)

Rachel R.
Swimming in public pool with open swim! Positives and negatives.

I did a lot of research into headphones I could wear while swimming at my local pool. I took me months to pull the trigger, and when I did I bought OpenSwim.

- the uploading process was easy. As someone who uses Spotify I had to pay an additional fee to another software to convert Spotify files into mp3. But once I had those it was just copy and paste onto the storage of the headphones.

- The sound quality underwater is amazing, very immersive.

- I have used them three times now for an hour each and the battery life is still high.

- The multi-function button isn’t enough. I can’t skip small portions of the audio, only whole files. If I want to swap from my audio book to music, I have to go through the entire audio book chapters.

- In a public pool, it can be loud. I swim the breast stroke, with my head above water. The sound quality isn’t as good as when it is underwater, and I find myself adjusting the speakers over my ears instead of my temples to be able to hear properly.

- The headset is a little big for me. I would have appreciated some way to adjust the size.

Overall though, I am glad I bit the bullet and purchased open swim. It has its flaws but based on the price range and others in the market, I’d say it’s at the top of the food chain.

One last (not positive or negative) thing to mention, is that it comes with two earplugs. I am unsure what they are for or their purpose.

In summary, the positives out way the negatives and I would recommend you buy yourself a set of OpenSwim if you enjoy public swimming.

Adrian M.
Fun back in swimming

Brilliant to listen to your Music and just switch off time really goes quick.makes swimming so much easier and fun


Q: Can I listen to online music by OpenSwim(Formerly Xtrainerz)?
A: OpenSwim(Formerly Xtrainerz) is an MP3 player headphone, no Bluetooth to connect with playing device for online music.  
Q: Can OpenSwim(Formerly Xtrainerz)be used in the sea?
A: Yes, OpenSwim(Formerly Xtrainerz)can be used in the sea/ under saltwater. After that, kindly clear and dry the headsets carefully. Please note OpenSwim(Formerly Xtrainerz)neither fit to use in the sauna nor hot spring.
Q: How many EQs does OpenSwim(Formerly Xtrainerz)have?
A: OpenSwim(Formerly Xtrainerz)is designed with two EQs to enjoy your music better. General mode used for the normal condition while Swimming mode used for swimming. You can press and hold the Mode button for 2s to switch it.
Q: What type of formats does OpenSwim(Formerly Xtrainerz)accept?
A: OpenSwim(Formerly Xtrainerz)accept files in the format of MP3, WMA, FLAC, WAV, AAC. For further details, find it here. You can connect OpenSwim(Formerly Xtrainerz)to the computer to drag the audio files into OpenSwim(Formerly Xtrainerz). Make sure the Pogo Pins of the OpenSwim(Formerly Xtrainerz)and the terminals of the USB Charging Cradle are in contact with each other.
Q:Is OpenSwim different from OpenSwim(Formerly Xtrainerz)?
A:OpenSwim is the new name for Xtrainerz. They are exactly the same products. In order to make it easier for sports people to understand the benefits Xtrainerz swimming MP3 player has now been re-named as OpenSwim, meaning swimming with open-ear listening.
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①IPX8 : This rating applies to items that are protected against effects of continuous immersion in water.
Test conditions:
1. Ensured that the appearance and function of the testing sample (OpenSwim(Formerly Xtrainerz)) was normal.
2. OpenSwim(Formerly Xtrainerz) was placed into the designated immersion tank.
3. Water was added to reach the standard 1m level line in the water tank, and a pressure of 0.1 atm was added.
4. Test time was 2 hours.
After testing, OpenSwim(Formerly Xtrainerz) functioned normally after being immersed in water of 2-meter depth for 2 hours.
IP6X: This rating applies to items that are protected against ingress of dust. Ingress of dust is not totally prevented.
Test conditions:
OpenSwim(Formerly Xtrainerz) was placed in a sealed box with a certain density of dust particles about 75 μm in diameter, and pumped under a negative pressure of 2Kpa for 8 hours.
OpenSwim(Formerly Xtrainerz) functions normally after the test.
②This data was the result of a test that was conducted using OpenSwim(Formerly Xtrainerz).
Test conditions: Copied the audio file (white noise with 44.1kHz sampling rate and 24bit bit depth in wav format) to the OpenSwim(Formerly Xtrainerz) headphones, adjusted to the standard EQ mode, and set the volume by pressing “Volume- “button four times from the maximum volume in a normal temperature environment.
Test content: OpenSwim(Formerly Xtrainerz) battery was fully discharged and then charged to 100%. The audio file was played until the headphones stopped playback. The duration time was counted as the continuous playback time of the headphones.
Test result: It showed that the OpenSwim(Formerly Xtrainerz) had a continuous playback time of up to 8 hours.
In actual use, battery life depends on device settings, environment, usage, and many other factors.
Let's Be Open!
With nothing inside or over your ears,
enjoy total awareness while you listen.
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