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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a set of open-ear headphones that can survive real water and keep your music going even when Bluetooth can't, choose Clooissr 32GB; if you need a simple, light, everyday open-ear headset for cycling and general training on dry land, choose HZMFNWX Air Conduction Open-Ear. That is the short version. The longer version matters a lot if you ride bikes, because cycling puts two demands on a headset at once: it has to stay put, and it has to let you hear traffic. I'll break down where each of these two designs wins, where it falls short, and which one I'd actually pick for cycling.
• Clooissr 32GB — biggest strength: a genuinely waterproof IPX8 bone conduction build with 32GB of built-in memory, so it works as an MP3 player with no phone and no signal.
• Clooissr 32GB — biggest trade-off: it's a more complex product. MP3 mode requires loading files from a computer, and Bluetooth simply won't work underwater.
• HZMFNWX Air Conduction Open-Ear — biggest strength: a lightweight, breathable open-ear design with a built-in mic that's dead simple to live with for calls, commuting and workouts.
• HZMFNWX Air Conduction Open-Ear — biggest trade-off: the spec sheet lists no waterproof rating, so I'd treat it as a dry-land and sweat-friendly headset, not a swim companion.
• Who each pick is for: Clooissr 32GB is for the rider who trains in all weather, swims, or wants music without carrying a phone. HZMFNWX is for the rider who wants a light, affordable-feeling open-ear headset for cycling, gym and calls.
The Clooissr 32GB (model B35) is built around one idea: keep the music going in places where normal earbuds give up. The headline spec is IPX8 waterproofing, rated for submersion up to about 6 feet, with a sealed structure and a nano-hydrophobic coating that blocks sweat and rain as well as water. That's a much tougher environmental spec than most open-ear headsets carry. It's also a bone conduction design, which means it sits against the ear bone rather than inside the canal, so your ears stay open and you can hear ambient sound — traffic, other riders, someone calling out a pass.
For cycling specifically, the interesting part is the fit system. Clooissr describes a multi-point support structure: an ear hook that stabilizes on the auricle, a front cabin that locks onto the ear bone, and a light left/right clamping force that balances the whole thing out. The claimed result is less cheekbone pressure than a traditional two-point bone conduction headphone, which is the usual complaint cyclists have on long rides. At roughly 0.8 oz (about 25 g), it's light enough that you stop noticing it, and the design is explicitly aimed at intense workouts. I'd also flag the low-frequency conduction technology, which Clooissr says cuts vibration by about 80% while keeping volume and sound quality — relevant because bone-conduction buzz is exactly what makes some riders take these off after an hour.
The other half of the story is the 32GB of built-in memory. Because Bluetooth can't travel through water, the Clooissr runs in MP3 mode when submerged; above water, both Bluetooth and MP3 work. On a bike, that means you can either stream from your phone or leave the phone at home and ride with nothing but the headset. You load music by converting files to MP3 or similar formats on a computer and copying them over. Battery is quoted at 8–10 hours of continuous playback with a 2-hour magnetic charge, and the frame uses a titanium memory alloy rated for 12,000 bend tests. The box includes swim earplugs and stabilizing straps.
Buy it if you ride in rain or sweat heavily, want one headset that also handles swimming, or like the idea of phone-free rides. Skip it if you only ever ride in dry weather and want the simplest possible Bluetooth headset — you'd be paying for waterproofing and storage you won't use, and the MP3-import step is extra admin.
The HZMFNWX Air Conduction Open-Ear is the straightforward version of the same idea. It's an air conduction open-ear headset: the drivers sit near the ears rather than inside them, so your canals stay unblocked and you keep awareness of what's around you — the whole point for running, cycling, walking and commuting. HZMFNWX leans into comfort here, describing a lightweight open-ear structure that reduces ear pressure versus traditional in-ear buds, with a secure wraparound fit meant to stay put through workouts, office calls, travel and daily listening.
It's a wireless Bluetooth headset that pairs with phones, tablets and laptops, and it has a built-in microphone for calls and meetings. That combination is what makes it a plausible one-headset-for-everything pick: music on the bike, a call on the way home, a video meeting at the desk. The brand lists it for running, gym, cycling, hiking, walking, driving, office and home use, and highlights the breathable feel for people who simply don't like things inserted into their ear canals. The enclosure is metal, the color is white, and it ships as a single piece with an adapter.
What the spec sheet doesn't give it is a waterproof rating. HZMFNWX calls it sweat resistant, which is a different and much softer claim than IPX8. So for cycling in the rain, or for anyone who wants to swim in their headphones, this isn't the tool. It's also a single-unit package, so there's no second earbud or accessory kit to fall back on.
Buy it if you want a light, uncomplicated open-ear headset for cycling, gym sessions, walks and calls, and you ride mostly in dry conditions. Skip it if you ride in heavy rain, sweat hard enough to soak a headset, or want built-in music storage so you can leave your phone behind.
• Best for all-weather cycling → Clooissr 32GB. IPX8 waterproofing with a sealed structure and hydrophobic coating is the more protective spec by a wide margin.
• Best for phone-free rides → Clooissr 32GB. The 32GB of built-in memory lets it run as an MP3 player with no Bluetooth connection at all.
• Best for swimming plus cycling → Clooissr 32GB. It's the only one of the two rated for submersion, and it ships with swim earplugs and stabilizing straps.
• Best for low-pressure fit on long rides → Clooissr 32GB. The multi-point support design and the claimed 80% reduction in bone-conduction vibration target exactly the discomfort riders notice after an hour.
• Best for simplicity and everyday versatility → HZMFNWX Air Conduction Open-Ear. It's Bluetooth-only, open-ear, with a built-in mic — nothing to configure and nothing to load.
• Best for calls and desk work between rides → HZMFNWX Air Conduction Open-Ear. The integrated microphone and lightweight wraparound fit make it an easy all-day headset.
• Best for dry-weather riders who dislike ear canal pressure → HZMFNWX Air Conduction Open-Ear. The breathable open-ear structure is the entire pitch.
• Best for battery predictability → Clooissr 32GB. An 8–10 hour playback figure with a 2-hour magnetic charge is stated plainly; HZMFNWX doesn't publish a runtime figure.
For cycling, I'd buy the Clooissr 32GB. In my opinion the IPX8 rating, the multi-point fit, the reduced-vibration bone conduction and the 32GB of offline storage solve the four problems that actually ruin a ride: rain, movement, pressure and phone dependence. The HZMFNWX Air Conduction Open-Ear is a good, simple open-ear headset for dry-weather riding, gym and calls, and if that's all you need, it will do the job. But when I picture a real cyclist — commuting in unpredictable weather, sweating through climbs, wanting music without strapping a phone to the bars — the Clooissr is the one I'd hand them. Check the current price on Amazon for both before you commit, since that's the one variable that can flip this decision.
FAQ
There's no single answer, but the two traits that matter most are a secure fit and water resistance. The Clooissr 32GB covers both with IPX8 waterproofing and a multi-point support fit; the HZMFNWX Air Conduction Open-Ear covers the secure-fit side with a lightweight wraparound structure and sweat resistance, but no stated waterproof rating.
Keep the volume low enough that you can still hear cars and other riders, and choose an open-ear model rather than one that seals your canal. Both headsets here are open-ear, so ambient sound gets through. If you ride in rain, the Clooissr's IPX8 sealing is the more sensible choice.
In most places, yes — but rules vary by country and city, and some areas restrict wearing anything over both ears while riding. Open-ear headsets like these are the least intrusive option because they don't block traffic noise. It's worth checking your local rules before you rely on them on the road.
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