How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want to protect and soften the headband of a Focal Bathys without changing how it sounds, choose YUELER Headband Sleeve; if you need a standalone set of open-ear wireless earbuds for running, workouts and calls, choose CuiSuto Open Ear Earbuds. These two products sit in completely different categories, so the real question isn't which one is "better" — it's which problem you're actually trying to solve. One is a fabric accessory for a headphone you already own. The other is a full audio device with its own battery, Bluetooth connection and charging case.
• YUELER Headband Sleeve — biggest strength: It wraps the Focal Bathys headband in breathable fabric, adding cushioning and shielding the headband from friction, wear and scratches.
• YUELER Headband Sleeve — biggest trade-off: It is not a headphone. It only fits the Focal Bathys, and it does nothing for sound, battery or connectivity.
• CuiSuto Open Ear Earbuds — biggest strength: A complete wireless audio package: open-ear design, 14.2mm dynamic drivers, Bluetooth 5.3, a charging case with LED power display and IP54 water resistance.
• CuiSuto Open Ear Earbuds — biggest trade-off: Open-ear sound is designed to let the outside world in, so it won't give you the isolation of a sealed or noise-cancelling design, and each earbud's 4-hour runtime depends on the case for top-ups.
• Who each pick is for: Buy the YUELER sleeve if you own a Focal Bathys and want more comfort plus headband protection; buy the CuiSuto earbuds if you want a lightweight, cord-free listening device for exercise, commuting and calls.
The YUELER Headband Sleeve is a single-purpose accessory, and that's exactly the point. It's a fabric sleeve sized for the Focal Bathys headband — roughly 22.5 x 10.5 cm flat — that zips closed around the headband. The zipper is the detail I like most here, because it means installation and removal don't require stretching or forcing anything: you open it, wrap it, close it. No adhesives, no tools, nothing permanent.
What it actually changes is the top of your head. The Focal Bathys is a premium over-ear headphone, and the stock headband is built for structural rigidity first. Adding a layer of soft, breathable fabric between the headband and your scalp spreads pressure a little and reduces the "hot spot" feeling that shows up during long listening sessions. The same fabric layer also takes the abuse that would otherwise land on the headband itself — friction against a bag, a desk, a hook, or the inside of a case. Over months of daily use, that's the difference between a headband that still looks clean and one that's scuffed and shiny at the edges.
Who should buy it: Focal Bathys owners who wear their headphones for hours at a time, people who travel with them and want to keep the headband looking fresh, and anyone who finds the stock headband slightly firm on the crown. It comes in black or gray, so you can match the headphone or go for contrast.
Who should skip it: Anyone who doesn't own a Focal Bathys — the fit is specific to that model. Also skip it if you're looking for a sound upgrade, because this is a comfort and protection product, not an audio one. And if you genuinely like the bare headband exactly as it is, there's no reason to cover it.
The CuiSuto Open Ear Earbuds are a different animal entirely: a complete true-wireless audio system built around an open-ear concept. Instead of sealing into your ear canal, they rest outside it and let sound enter naturally. That's the whole design philosophy, and it drives everything else — reduced pressure on the eardrum, no plugged-up feeling, and the ability to hear traffic, a running partner or a gym announcement while your music keeps playing.
On the technical side, these use a 14.2mm dynamic driver with 16 ohm impedance, and CuiSuto describes the tuning as deep bass with clear stereo sound. There's a built-in microphone for calls, and the open design means your own voice doesn't sound muffled back to you — a genuine advantage for phone conversations compared with fully sealed buds. Connection is Bluetooth 5.3 with a stated range of about 10 meters, plus touch controls on the earbuds for playback, volume and answering calls.
Battery is where the numbers get interesting. Each earbud gives roughly 4 hours of playback on a full charge, and the charging case extends that to a total of about 36 hours. The case has an LED display that shows remaining power and charging status, which is far more useful than a vague blinking light. A full charge takes about 4 hours. The earbuds themselves weigh just 6g each and are made from lightweight polycarbonate, so they're designed to disappear on your head during a run.
One thing to keep straight: the listing title mentions IPX7, while the feature copy and the product details both specify IP54 water resistance. I'd plan around IP54 — splash and sweat resistant, fine for running, workouts and light rain, but not something I'd take swimming. Speaking of which, the copy lists swimming among the use scenarios, but with IP54 and an open-ear fit, I'd treat pool laps as a stretch and keep these for land-based training.
Who should buy them: runners, cyclists, gym-goers and walkers who want music without blocking out their surroundings; people who dislike the pressure of in-ear tips; anyone who takes a lot of calls and wants a mic plus touch controls; travelers who want a compact charging case with a visible battery readout.
Who should skip them: anyone who wants deep isolation from a noisy commute or a loud office. Open-ear means open — background noise comes in, and that's by design, not a defect. If you want to disappear into the music, this isn't the form factor for you.
• Best for headband comfort on an existing headphone → YUELER Headband Sleeve. It adds a soft fabric layer to the Focal Bathys headband and reduces long-wear pressure.
• Best for protecting an expensive headphone's finish → YUELER Headband Sleeve. It absorbs the friction, wear and scratches the headband would otherwise take.
• Best for running and outdoor workouts → CuiSuto Open Ear Earbuds. 6g per earbud, lightweight PC build, IP54 splash resistance and an open fit that keeps you aware of traffic.
• Best for battery life → CuiSuto Open Ear Earbuds. About 4 hours per charge and roughly 36 hours total with the charging case, with an LED display to track it.
• Best for phone calls → CuiSuto Open Ear Earbuds. Built-in microphone plus touch controls for answering and managing audio.
• Best for awareness while listening → CuiSuto Open Ear Earbuds. The open-ear design lets ambient sound in on purpose.
• Best for a specific, model-locked fix → YUELER Headband Sleeve. It only fits the Focal Bathys, which is exactly why the fit is clean.
• Best "complete device" purchase → CuiSuto Open Ear Earbuds. It's a full wireless system out of the box; the YUELER sleeve is an accessory for something you already own.
These two don't really compete, so my recommendation depends on what you already have. If a Focal Bathys is sitting on your desk and the headband has started to bother you or show wear, I'd buy the YUELER Headband Sleeve — it's a cheap, reversible fix that addresses comfort and protection at the same time, and the zippered design makes it easy to live with. If you don't own that headphone, skip it entirely. For anyone who wants actual sound in their ears during a run, the CuiSuto Open Ear Earbuds are the more complete purchase: open-ear comfort, Bluetooth 5.3, a mic, touch controls and a charging case with a real battery readout. In my opinion, the deciding factor is simply whether you're accessorizing a headphone or buying one.
FAQ
Not in the isolating sense. Their noise control is listed as sound isolation and the open-ear design deliberately lets ambient sound in. That's a safety and comfort feature for outdoor use, but it won't silence a noisy train carriage.
The listing states it's made for the Focal Bathys headphone, and the flat size is about 22.5 x 10.5 cm. It's a model-specific accessory, so I wouldn't count on a good fit elsewhere.
Each earbud gives about 4 hours of playback, extending to around 36 hours with the charging case. Water resistance is listed as IP54 — sweat and splash resistant, which suits running and workouts, but I wouldn't swim in them.
Ask yourself one question: do you already own a Focal Bathys and want it more comfortable and better protected, or do you want a wireless listening device for exercise and calls? The first answer points to the YUELER sleeve, the second to the CuiSuto earbuds. If budget matters to you, check the current price on Amazon using the button on this page before deciding.
As an Amazon Associate I earn from qualifying purchases.
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon and affiliated sites.
When you buy through links on this page, we may earn a commission from qualifying purchases at no extra cost to you.
Amazon and the Amazon logo are trademarks of Amazon or its affiliates. This site is an independent third-party review and is not affiliated with, endorsed by, or sponsored by Amazon or the product brands mentioned.
See also: WUNIAK Case vs Jxrev Earbuds: Charging Case Earbuds, VOICEPING PTT Earpiece USB vs Stouchi 2-in-1, Sennheiser Momentum True vs Avantree Eon, Amazon Renewed Beats vs iClever Q950