How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-20 · 6 min read · Independent comparison
• TANALAZ's biggest strength: a 36-hour battery and a lightweight clip-on open-ear fit that stays comfortable through long workouts, commutes and workdays, with Bluetooth 6.0 for low-latency audio and calls.
• TANALAZ's biggest trade-off: IPX5 only protects against sweat and rain — it is not built for submersion, and there's no built-in MP3 storage, so you always need a paired device.
• esonstyle's biggest strength: a genuinely IP68 fully-submersible design with 8GB of built-in MP3 storage, so you can swim laps with music and no phone anywhere near the pool.
• esonstyle's biggest trade-off: battery life is far shorter at 8 hours per charge, and underwater listening only works in MP3 mode — Bluetooth does not transmit through water.
• Choose TANALAZ if you train on land, want maximum playtime and take calls on the move.
• Choose esonstyle if you swim, surf or kayak and want your music stored on the headphones themselves.
The TANALAZ Open Ear Earbuds I50 are built around one idea: keep the ear canal open and the battery running for days. The clip-on design hooks around your ear instead of plugging into it, which means ambient sound stays audible — traffic, gym announcements, a colleague asking you a question. That open-ear placement is also why the brand says it won't interfere with glasses or cause the ear fatigue that comes from stuffing tips into your canals for hours. If you wear specs and hate re-seating earbuds every ten minutes, this is the shape you want.
The headline number here is 36 hours of playtime from a charge. That's the kind of figure that changes your routine: you stop thinking about charging every night, and the headphones are simply ready when you are. Bluetooth 6.0 handles the connection side with quick pairing and a stable, low-latency link to a phone, tablet or laptop, and the description mentions ENC clear calls and a no-sound-leakage design, so they can double as a work headset in a shared space. An IPX5 rating covers heavy sweat and rain — fine for running, lifting, hiking and miserable-weather commutes.
esonstyle Swimming Headphones Underwater: Who It's For
The esonstyle Swimming Headphones Underwater are a specialist tool, and the spec sheet says so plainly. IP68 means fully submersible — the brand rates them for depths up to 3 meters for 60+ minutes, which covers swimming, surfing, kayaking and heavy rain runs. Bone conduction drivers push sound through your cheekbones, keeping your ears completely open so you still hear your surroundings, which matters on a road ride or a trail run.
The feature that actually changes how you use these is the 8GB built-in MP3 player. That's storage for thousands of songs directly on the headphones, so you can leave your phone in a locker and still have music for laps. The catch is important and the brand states it repeatedly: underwater, Bluetooth does not work, because water interferes with the signal. You double-click the MFB button to switch into MP3 mode, and that's the mode you swim in. You load files by connecting the headphones to a computer with the charging cable. In MP3 mode the default is sequential playback, and three presses of the MFB button switches to shuffle.
Physically, these are light — 28g on a titanium frame with a flexible fit — and the battery runs about 8 hours, with a 2-hour charge time. Bluetooth 6.0 with a listed 15-meter range handles the dry-land side, including calls. Who should buy them: swimmers, surfers and anyone who wants untethered music without carrying a phone. Who should skip them: if you mostly train on land and want long battery life, 8 hours per charge and the MP3-mode workaround are extra friction you don't need. The included earplugs and adjustable strap also hint that this is a water-first kit rather than an everyday pair.
Side-by-Side: Which Should You Choose?
• Best for battery life → TANALAZ Open Ear Earbuds. 36 hours versus 8 hours is not a small gap; it's the difference between charging weekly-ish and charging constantly.
• Best for phone-free listening → esonstyle. 8GB of onboard MP3 storage means no paired device required.
• Best for calls and everyday use → TANALAZ. Bluetooth 6.0 with ENC clear calls and a no-leakage design suits meetings, commutes and shared offices.
• Best for all-day comfort with glasses → TANALAZ. The ultra-lightweight clip-on fit is explicitly designed not to interfere with eyewear or cause ear fatigue.
• Best for sweat, rain and land training → TANALAZ. IPX5 covers exactly that; the esonstyle pair is overkill here and shorter on runtime.
• Best for trail running and cycling where you must hear traffic → either, honestly. Both are open-ear and both use bone conduction drivers, so both keep your ears open; pick based on whether you want a phone or not.
• Best for a single do-everything pair → TANALAZ, unless your version of "everything" includes getting in the water.
For most people reading this, I'd buy the TANALAZ Open Ear Earbuds. The 36-hour battery, the glasses-friendly clip-on fit, Bluetooth 6.0 and IPX5 sweat protection cover the way the majority of us actually train and work — on land, all day, with a phone in a pocket. The esonstyle pair is the better product for one specific job, and it does that job well: IP68 submersion plus 8GB of onboard music is a combination TANALAZ simply doesn't attempt. So if you swim, buy the esonstyle. If you don't, the TANALAZ pair will fit your life with far less fuss.
No. It carries an IPX5 rating, which the brand describes as protection against heavy sweat and rain. It is not rated for submersion, so it's the wrong pick for pool or open-water swimming.
Can I use the esonstyle Swimming Headphones Underwater with Bluetooth while swimming?
TANALAZ by a wide margin — 36 hours of playtime on a charge versus roughly 8 hours for the esonstyle. That single figure is the main reason I'd default to TANALAZ for land-based training and daily use.
Neither does. Both datasheets list noise control as "None," which is expected for open-ear designs — the whole point is that you keep hearing your surroundings.
Both are sold on Amazon and pricing moves around, so check the current price on Amazon using the button on this page before you decide — that's the only figure that matters at the moment you buy.
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