How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a swimming-first pair that keeps playing without your phone, choose RELAXYO Bone Conduction Swimming; if you need longer battery life and a more comfortable everyday fit for cycling and the gym, choose Haowolf Bone Conduction Headphones.
• RELAXYO's biggest strength: 32GB of built-in storage and a true IP68 rating, so you can swim laps with music and no phone nearby.
• RELAXYO's biggest trade-off: 7 hours of playback and a 1.5-hour charge, plus a beige titanium frame that looks more like swim gear than street wear.
• Haowolf's biggest strength: 10 hours of playback on a single charge and 16mm dynamic drivers for a fuller, bass-forward sound.
• Haowolf's biggest trade-off: No built-in memory, so it can only play what you stream or download over Bluetooth 5.4 — nothing works underwater.
• Pick RELAXYO if you want one pair that handles pool sessions, open-water swims and long rides without a phone in your pocket.
• Pick Haowolf if you ride, run or commute for hours and want the longest battery life and the richer sound of the two.
RELAXYO's headline feature is the combination of an IP68 waterproof rating and 32GB of onboard storage. That matters because Bluetooth simply cannot transmit through water, and RELAXYO says so plainly. The fix is a dedicated MP3 mode: load your tracks through the included magnetic charging cable, then double-press the power button to switch modes before you get in the pool. The sheet estimates roughly 7,000 songs fit in that 32GB, which is far more than most people will ever need for a swim.
The rest of the design leans toward sport. The frame is memory titanium, so it bends and springs back instead of cracking, and RELAXYO describes it as light enough to wear for long stretches without obvious pressure. It's rated to sit over the ear in an open-ear shape, which is exactly what you want for cycling — you keep traffic noise in your ears while your music plays through your cheekbones. Bluetooth 5.4 covers about ten metres in open space, and the three-button layout (power in the middle, volume up/down on the sides) handles play, pause, calls and mode switching without you looking down. Charging takes 1.5 hours for up to 7 hours of music.
Buy RELAXYO if you swim and want music with no phone, or if you want one pair that covers swimming, surfing, running and cycling. Skip it if you rarely go near water and just want the longest possible runtime — 7 hours is fine, but it isn't class-leading, and the beige titanium finish is a specific look you either like or don't.
Haowolf's pitch is endurance and sound. It claims up to 10 hours of continuous playback from a single charge, and the spec sheet lists the same figure for charge time and average battery life — worth checking the product page carefully if you're planning around recharge speed. Either way, 10 hours is a genuinely long session: a full day of commuting, a long weekend ride, or several gym visits between charges.
The audio hardware is the other differentiator. Haowolf uses large 16mm dynamic drivers, which is a big number for an open-ear design, and the brand promises deep bass and clear highs across a 20Hz–20,000Hz range. Bone conduction drivers sit in both products, so neither blocks your ear canal — but Haowolf's tuning is explicitly aimed at a wider, richer soundstage for music and podcasts. The X16 also uses touch controls rather than physical buttons, which feels modern but can be fussier with sweaty or gloved hands.
The build is IPX8 waterproof, which Haowolf frames around rain and high-intensity workouts rather than pool laps. That's the honest distinction: water resistance is excellent, but there's no onboard storage, so the moment you submerge your head, Bluetooth drops out. Buy Haowolf if you cycle, run, commute or train indoors and want the longest battery life, a lighter-feeling pressure-free fit and the fuller sound of the two. Skip it if swimming with music is the whole point.
Side-by-Side: Which Should You Choose?
• Best for swimming with music → RELAXYO Bone Conduction Swimming. IP68 plus 32GB of MP3 storage means it works where Bluetooth can't.
• Best for sound quality → Haowolf Bone Conduction Headphones. 16mm dynamic drivers point to a bigger, bassier presentation.
• Best for fast top-ups → RELAXYO Bone Conduction Swimming. 1.5 hours to full is a quick turnaround between sessions.
• Best for cycling in traffic → Both. Open-ear bone conduction keeps your ears free, which is the whole reason to buy either.
• Best for phone-free workouts → RELAXYO Bone Conduction Swimming. No storage on the Haowolf means no phone, no music.
• Best for touch-control fans → Haowolf Bone Conduction Headphones. Touch versus RELAXYO's three physical buttons.
• Best for a low-fuss everyday pair → Haowolf Bone Conduction Headphones. Nothing to load, nothing to switch modes.
In my opinion, the right pick comes down to one question: do you swim? If yes, I'd buy the RELAXYO Bone Conduction Swimming. The 32GB of storage and IP68 rating solve a problem the Haowolf simply can't, and 7 hours is still plenty for a ride or a run on top of your pool time. If you never get in the water, I'd go with the Haowolf for the 10-hour battery and the 16mm drivers. It's the better everyday cycling companion, and you give up nothing that matters on dry land.
Yes, for one structural reason: RELAXYO has 32GB of built-in storage and an MP3 mode, so music keeps playing underwater. The Haowolf is IPX8 waterproof too, but with no onboard memory it relies on Bluetooth, which doesn't transmit through water.
Which has longer battery life, RELAXYO or Haowolf?
Both are open-ear bone conduction designs, so your ear canals stay open and you can hear traffic — that's the main appeal for cyclists. RELAXYO uses physical buttons, which I find easier to work by feel with gloves on; Haowolf uses touch controls.
If "everything" includes swimming, RELAXYO. It covers pool, road and trail. If your workouts are dry — cycling, running, gym — Haowolf's longer battery and bigger drivers make it the more practical daily pair. Check the current price on Amazon before deciding, since that's the one factor these specs can't settle for you.
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