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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 complete pair of open-ear earbuds you can wear all day and still hear the world around you, choose NANK Open Ear; if you need a protective, decorative case for the Bose Ultra Open Earbuds you already own, choose Aircawin Bose. These two products share the phrase "open ear," but they solve completely different problems — one is the earbud, the other is the case around the earbud.
• NANK Open Ear — biggest strength: A genuine set of clip-on open-ear earbuds at just 4.8 g per bud, with Bluetooth 6.0, dual-device multipoint, and up to 30 hours of total playtime with the case.
• NANK Open Ear — biggest trade-off: Open-ear design means you are deliberately not sealed off from noise, and the 374 ms listed latency is not built for competitive gaming.
• Aircawin Bose — biggest strength: A shockproof, anti-yellow TPU shell that wraps the Bose Ultra Open Earbuds case with full 360-degree protection, plus a flower keychain and a cleaning pen.
• Aircawin Bose — biggest trade-off: It is a case only. The Bose earbuds and charging case are not included, so it does nothing on its own.
• Who NANK Open Ear is for: Anyone shopping for the actual earbuds — small-ear comfort, running, commuting, workouts, calls.
• Who Aircawin Bose is for: Someone who already owns the Bose Ultra Open Earbuds and wants to protect and personalize the case.
The NANK Clip Super2 is built around one idea: keep the ear canal open and the bud off the inner ear. Instead of pressing into your ear, it clips onto the outer ear with a flexible C-flex memory bridge that adapts to different ear shapes. At just 4.8 g per bud, that design matters a lot for small ears — there is no tip to jam in, no seal to fight, and nothing to size up or down. If you have ever given up on earbuds because every tip felt like a plug, this is the category worth trying.
On the audio side, NANK pairs an 11 mm bass driver with its NanoBass tuning and the Omni-SSA Sound Engine 2.0, so you get real low-end and clear vocals while your ears stay open to traffic, coworkers, or a running trail. The spec sheet lists a 16 ohm impedance, 95 dB sensitivity, and a 20 kHz frequency response — a friendly, easy-to-drive profile for a phone. Calls run through 32K HD call tech with noise and wind reduction, and DS3.0 directional audio is there to limit sound leakage so your podcast doesn't broadcast to the whole bus.
Day to day, the practical numbers are the selling point: Bluetooth 6.0, multipoint for two devices at once (phone plus laptop), touch controls, Type-C charging, and up to 30 hours total with the case — with the brand noting up to 8 hours at 50% volume. An IPX5 rating covers sweat and light rain. Buy it if you want a lightweight, all-day open-ear bud for running, gym, commuting, and calls, and you care about fitting small or awkward ears. Skip it if you want total noise isolation, deep in-ear bass, or a low-latency gaming bud — the open design and the 374 ms latency figure aren't aimed at that.
Read the name carefully: the Aircawin product is a case, not earbuds. It's a clear TPU cover designed to fit the 2024 Bose Ultra Open Earbuds charging case, and the Bose earbuds and charging case are explicitly not included. So the person who should buy this is someone who has already decided on the Bose Ultra Open Earbuds and now wants to keep that case looking new.
What it actually delivers is protection and personality. The TPU is described as eco-friendly and anti-yellow, so the clear shell is meant to stay clear rather than fogging over with age, and the interior micro-dot pattern is there to stop that sticky, wet-looking film between case and cover. Protection is 360-degree, aimed at bumps, drops, scratches, fingerprints, and dust without adding much bulk. The two-part, hingeless design is cut so you can still reach the pairing button, and the front LED stays visible whether you're charging by cable or wirelessly.
The extras are the fun part. You get a girly flower keychain you can clip to a backpack, belt loop, or keys so the case is harder to lose, plus a multi-use cleaning pen with a charging-hole brush on one side and a plush brush with a round metal nib on the other. If you like the camellia look and want your Bose case to read as personal rather than plain, that's the whole pitch. Skip it if you don't own Bose Ultra Open Earbuds — it will not fit anything else — or if you're actually shopping for earbuds, because there are none in the box.
Side-by-Side: Which Should You Choose?
• Best for small-ear comfort → NANK Open Ear. The 4.8 g clip-on, tip-free fit is the whole reason to consider it.
• Best for protecting what you own → Aircawin Bose. 360-degree shockproof TPU coverage for the Bose case.
• Best for battery life → NANK Open Ear. Up to 30 hours total with the charging case, and up to 8 hours at 50% volume.
• Best for workouts and sweaty sessions → NANK Open Ear. IPX5 sweat and light-rain resistance on the buds themselves.
• Best for switching between phone and laptop → NANK Open Ear. Bluetooth 6.0 with dual-device multipoint.
• Best for gifting to a Bose owner → Aircawin Bose. The camellia design, flower keychain, and cleaning pen make it a ready-made little gift.
• Best for staying aware of your surroundings → NANK Open Ear. Open-ear design means nothing blocks the outside world.
If I had to pick one, I'd buy the NANK Open Ear — but only because it's the product that actually does something on its own. In my opinion, the clip-on, 4.8 g, tip-free design is the smartest choice for anyone with small or hard-to-fit ears, and Bluetooth 6.0, multipoint, IPX5, and 30 hours of playtime cover nearly everything a daily listener needs. The Aircawin Bose is a nice accessory, and I'd genuinely recommend it — to someone who already owns the Bose Ultra Open Earbuds and wants to protect them. Buy the NANK to listen. Buy the Aircawin to protect.
No. It's a clear TPU protective case for the Bose Ultra Open Earbuds charging case. The Bose earbuds and charging case are not included, so it's an accessory for something you already own.
The design uses a C-clip with a flexible memory bridge and a non-slip fit, and it's rated IPX5 for sweat and light rain — a sensible match for running and gym use, though fit always comes down to your individual ear shape.
In my opinion, the NANK Open Ear. Its 4.8 g clip-on design avoids ear tips entirely, so there's no seal to fight and nothing pressing into the canal. The Aircawin doesn't touch your ears at all — it wraps a case.
I don't list prices here, since they change often. Check the current price on Amazon using the button on this page for both the NANK Open Ear and the Aircawin Bose case.
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