For earbuds that translate language on runs and rides, Niecase wins for exercise: its open-ear design, IP67 rating, and 10-hour battery suit active use.
Matast is the runner-up if you prefer secure-fitting ear hooks, IP7 water protection, and a charging case with up to 50 hours of total playtime.
• Niecase Bone Conduction Headphones — best for outdoor exercise; pick this if you want an open-ear design and IP67 water protection.
• Matast Earbuds — best for workouts with a secure fit; pick this if you want flexible ear hooks, three ear-tip sizes, and up to 50 hours with the case.
• Matast Earbuds — best for longer stretches between case charges; pick this if you want the same hook-style design with up to 75 hours of total playtime.
• Sennhesier Sennheiser Momentum True — best for adjustable listening; pick this if adaptive noise cancelling, Clear Mode, and touch controls matter more than an exercise-first design.
• A quick clarification matters for this search: none of these product descriptions lists a language-translation feature. They are Bluetooth headphones or earbuds, not dedicated translation devices. If you need spoken translation, check that your intended translation app or service supports the earbuds and phone you plan to use. I’m comparing the listed listening and exercise features, not promising live translation.
Niecase takes a different approach from conventional in-ear buds. Its bone-conduction drivers sit in an open-ear design, so your ears are not blocked. That is the most meaningful distinction here for runners and cyclists who want to keep ambient sounds in their awareness. It is also why I put this model first for exercise: the design has a clear outdoor-use rationale, rather than simply a workout-friendly shape.
The IP67 rating is specified for resistance to sweat and water exposure, and the listed battery life is up to 10 hours. Together, those details point to a headset suited to extended workouts, including runs and rides where charging mid-session is inconvenient. Bluetooth 6.0 and a stated range of up to 15 meters add wireless flexibility, though connection performance can vary with surroundings and devices.
There is a built-in microphone for calls and support for connecting to two devices simultaneously, such as a phone and computer. Button controls keep operation physical rather than touch-based. The headset also offers Music and Game modes, with Game Mode described as low-latency audio. Those features may be useful beyond exercise, but they do not add language translation.
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-11 · 7 min read · Independent comparison
The main trade-off is the open-ear format. It supports awareness of surrounding sound, but it does not provide the sound isolation of sealed in-ear earbuds. If your priority is a snug ear-canal fit, or reducing outside noise, this is not the match. In my opinion, it is the strongest choice here for outdoor exercise when awareness and water protection lead your checklist.
This Matast pair uses in-ear earpieces with flexible hooks designed to help keep them in place during vigorous movement. Three ear-tip sizes are listed, giving you some choice in fit. For someone comparing the best comfortable in ear earbuds for exercise, that adjustability is more relevant than the bass description: comfort and stability depend heavily on how the tips fit your ears.
The product lists IP7 water protection against sweat, rain, and splashes. Each charge is specified for up to 10 hours of music, with up to 50 hours total when using the charging case. A dual LED display shows the case’s remaining power and the earbuds’ charging progress; the case uses USB-C and is listed as fully charging in 1.5 hours. That combination makes it easier to plan charging around a regular workout routine.
Bluetooth 5.4, a stated wireless range of up to 15 meters, and compatibility with Bluetooth-enabled phones, tablets, and laptops make these suitable for ordinary wireless listening. The 13 mm drivers are described as producing bass, midrange, and treble, while the microphones use ENC noise reduction for calls. Touch controls cover playback and calls. Those are useful everyday features, but the listing does not identify a translation function or promise that the microphones translate speech.
The trade-off is that an in-ear fit blocks more of the ear than Niecase’s open-ear design. That may appeal if you want a more contained listening experience, but it is worth considering for outdoor routes where hearing traffic matters. I’d choose this version over an open-ear headset for gym sessions where a hooked fit and case-based battery reserve are the priorities.
Matast Earbuds
This second Matast model has the same broad exercise-focused design: in-ear earpieces, flexible hooks, three sizes of ear caps, IP7 water protection, Bluetooth 5.4, and touch controls. It also lists 13 mm drivers and a 15-meter Bluetooth range. The shared fit and connection details make it a familiar option for running or gym sessions if you are already considering the other Matast pair.
The clearest stated difference is total listening time with the charging case: up to 75 hours, compared with up to 50 hours for the other Matast model. A single charge is still listed for up to 10 hours, and the case uses USB-C with a stated 1.5-hour charging time. In daily terms, the longer combined figure is most relevant if you want to carry the case for repeated listening sessions without needing to recharge it as often.
The trade-off is that the longer case-supported playtime does not mean longer listening on a single charge: that figure is the same as the other Matast model. Both also use an in-ear hook design, which will not suit someone who wants ears left open. I’d pick this version over the other Matast pair if the additional stated case-supported listening time is the deciding factor; otherwise, their listed exercise features are very similar.
Sennhesier Sennheiser Momentum True
The Momentum True Wireless 4 is the most feature-rich listening option in this group, with adaptive active noise cancelling, Anti-Wind Mode, and Clear Mode. Clear Mode is intended to let more of the surrounding sound through when you want awareness, while adaptive ANC is designed to respond to outside noise. For exercise, that flexibility can be useful, though the in-ear design remains different from Niecase’s open-ear approach.
Sennheiser lists soft silicone ear tips, customizable touch controls, Bluetooth 5.4, and multi-connectivity. The stated continuous-use time is up to 30 hours, and fast charging is described as providing up to an hour of listening after an eight-minute charge. The package information also lists a wireless charging case. These details suit someone who wants a general-purpose set for commuting, calls, and listening as well as workouts.
LE Audio and Auracast are included among its connectivity features, with LE Audio noted as requiring a software update. These are audio technologies, not a listed language-translation system. The listing does not specify an IP water-resistance rating, so I would not choose this model on the assumption that it has the same documented sweat or water protection as the two Matast models or Niecase.
Its trade-off is therefore straightforward: it offers the most explicit control over sound around you, but the provided details do not establish water protection for exercise. In my opinion, it makes more sense for people who want adaptive listening across varied settings than for someone shopping specifically for a sweat-focused workout headset.
We compared the published design, connectivity, battery, control, and water-protection details for each model.
The order is our independent editorial opinion based on those specifications and the exercise use case.
No brand paid for placement.
None of the four product descriptions lists built-in language translation. They are Bluetooth audio devices; translation would depend on a compatible app or service on your connected phone.
The Niecase Bone Conduction Headphones use an open-ear design. That means the ears are not blocked, unlike the in-ear Matast and Sennheiser models.
Niecase lists an IP67 rating, while both Matast models list IP7 protection. The Sennheiser information provided here does not specify a water-resistance rating.
Check whether your phone’s translation app supports the earbuds and whether it can handle your intended languages and conversation setup. Bluetooth connectivity alone does not confirm that live translation is available.
My final recommendation for exercise is the Niecase Bone Conduction Headphones: the open-ear design, stated IP67 protection, and up-to-10-hour battery make the clearest fit for outdoor movement. Choose a Matast model instead if you prefer hooked in-ear earbuds and want its listed case-supported listening time.
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