Shokz OpenRun Pro 2 vs OpenSwim Pro: bass on land or music underwater

The verdict

Every published number

One maker, one comparison table, so these figures were measured the same way and the gaps between them are real rather than marketing artefacts.

1. IP68 to 2 m against IP55

This is the gap that justifies the whole product, and both digits move.

• Dust: 6 on the OpenSwim Pro means dust-tight — no ingress at all. 5 on the Pro 2 means dust-protected: some gets in, not enough to interfere. In a gym bag with chalk in it, that is not nothing.
• Water: 8 means continuous immersion at a depth the maker must state, and Shokz states 2 m for the OpenSwim Pro. 5 means a 6.3 mm jet from any direction. The step from 5 to 8 is the step from “survives being sprayed” to “works submerged.”

Two practical consequences. First, you can rinse the OpenSwim Pro after a salty session, and you cannot rinse the Pro 2 — Shokz reserves tap-washing for its IP67-and-above models and describes care for the Pro line as a damp cloth. Second, chlorine and salt are chemical exposures the IP test never covers; rinsing a swim headphone in fresh water after the pool is a habit the rating does not excuse you from. The rating ladder and what each rung is tested with is in waterproof vs water-resistant earbuds.

2. Why swimming needs onboard storage

The OpenRun Pro 2 has no storage at all. It is a Bluetooth headset, full stop, and that is the correct design for a product that is never going underwater.

3. DualPitch against 8th-gen bone conduction

The Pro 2 runs Shokz's 10th-generation DualPitch system: the bone transducer plus a small air-conduction driver aimed at the ear. The OpenSwim Pro runs 8th-generation PremiumPitch 2.0+, which is bone only.

Bone conduction is physically poor at low frequencies. Producing real bass through the skull would mean vibrating it hard enough that you feel a buzz on your cheekbone rather than hear a bass line, which is why SoundGuys describes sub-bass and bass across the category as virtually inaudible. An air driver sidesteps that limit for the low end only, and it is why the Pro 2 is the best-sounding neckband we rank. The full version of that argument is in do bone conduction headphones sound good?

There is a second, swimming-specific sound note worth knowing before you buy: underwater, bone conduction gets louder and fuller, because your ear canals fill with water and the usual air path is removed. Reviewers describe it as a sense of fullness that is not there on land. So the OpenSwim Pro's weaker driver matters less in the water than it does on a run. The detail is in the OpenSwim Pro review.

4. Battery, charging and the cable

12 hours on the Pro 2 against 9 hours of Bluetooth or 6 hours of MP3 on the OpenSwim Pro. The MP3 figure is the one that matters for swimmers and it is the lowest number on either sheet — still four or five pool sessions.

Charging is where the OpenSwim Pro pays for its rating. The Pro 2 takes USB-C and fills in an hour. The OpenSwim Pro uses a magnetic induction cable and takes about 90 minutes, because a USB-C port is a hole, and a hole is the hardest thing to seal to IP68. Shokz has said as much itself. The consequence is a proprietary cable you have to not lose; pack a spare for any trip longer than the battery.

Quick charge: 5 minutes for 2.5 hours on the Pro 2, 10 minutes for 3 hours on the OpenSwim Pro. Both are good enough to rescue a forgotten charge.

5. The triathlon case

If you swim, bike and run, the OpenSwim Pro is the only one of these two that covers all three disciplines: MP3 mode for the pool, Bluetooth 5.4 with dual AI mics for the bike and the run. That is the strongest argument for it over a dedicated pool player.

Two caveats. It has no multipoint, where the Pro 2 does, so a phone-and-laptop handover means re-pairing. And a neckband under a swim cap is fine, but a neckband under a cycling helmet fights the rear retention dial — the geometry and the put-on order are in headphones under a cycling helmet. If open water and deeper immersion are the point, the H2O Audio TRI 2 PRO is rated to 12 ft rather than 2 m; it is ranked in best bone conduction headphones for swimming.

If you only need sweat, not swim

Most people who look at the OpenSwim Pro do not actually want to swim in it — they want a headphone that does not die of sweat. That is a cheaper problem. The OpenRun Air 2 is IP67, 26.4 g, 10 hours and Bluetooth 6.0, and Shokz permits rinsing it under a tap while printing “not for swimming” beside the rating. It is the right answer for a heavy sweater who never gets in the pool, and the straight comparison against the Pro 2 is in OpenRun Air 2 vs OpenRun Pro 2.

For the whole Shokz line ranked against each other, start at best Shokz headphones. And settle the band size before the model either way: Standard vs Mini has the measurement and the cut-off.