How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-18 · 7 min read · Independent comparison
• LOBKIN's biggest strength: IP68 waterproofing plus 32GB of built-in memory — roughly 8000 tracks you can play with no phone anywhere near the pool.
• LOBKIN's biggest trade-off: It's an open-ear bone conduction design with no active noise control, and Bluetooth simply doesn't work underwater — you must switch to MP3 mode.
• Piegricdiat's biggest strength: A true in-ear fit with skin-soft silicone tips and a dedicated sleep mode that disables the buttons so you don't wake yourself up rolling over.
• Piegricdiat's biggest trade-off: Bluetooth 5.3 only, no built-in storage, and no stated playtime figure — and its IPX6 rating is a step below LOBKIN's IP68.
• Choose LOBKIN if your priority is swimming, sweat, and untethered MP3 playback.
• Choose Piegricdiat if your priority is sleeping on your side and staying invisible at your desk.
This is a sport headphone first and a music player second. The core idea is bone conduction: instead of pushing drivers into your ear canal, it sends sound through vibrations while leaving your ears completely open. That matters outdoors. On a bike or a run, you hear traffic and other people. Over a long training session, you don't get that pressurized, stuffed-up feeling that in-ear buds create. The frame is a flexible titanium alloy that the spec sheet says won't deform, wrapped in a soft skin-friendly coating, and the whole thing weighs 29 grams. For a hook-style open-ear design, that's genuinely light.
Buy it if you swim, surf, run or cycle and want music without carrying your phone poolside. Skip it if you want to block out the world — there is no noise control here, and the open-ear design deliberately lets sound in. It's also not the pick for lying on your side in bed; the hook frame and rigid band are built for movement, not pillows.
Piegricdiat Invisible Sleep Headphones: Who It's For
Piegricdiat solves a very specific, very annoying problem: falling asleep with earbuds in. The buds sit deep and discreet, small enough to disappear in your ears, which is why the brand leans on "invisible" — useful at work, useful on a plane, useful when you don't want anyone to know you're listening to something. The tips and caps are made from a proprietary skin-soft silicone, and the whole point of the design is that side sleepers can press their ear into a pillow without the sharp, painful jab a normal hard-shell bud delivers.
The feature I actually like most here is sleep mode. In that mode every physical button is disabled and you control everything from your phone, so rolling over or brushing your ear against a pillowcase won't skip a track or hang up a call. That's a small design decision that shows the product was thought through for its actual use case rather than just relabeled. Audio is handled by a Bluetooth 5.3 binaural chip with 3D surround processing and what the brand calls whale-cavity stereo surround, plus a built-in noise-reduction microphone for calls. Noise control is passive — the seal does the work, not electronics. Charging takes about 1 hour. The unit weighs 1.6 ounces including its case, which comes in pink against the beige buds.
One spec to read literally: the listing mentions continuous underwater use beyond 6 hours alongside an IPX6 rating. IPX6 is a strong water-jet rating, and IPX-rated (not IP68) gear is generally treated as splash- and sweat-resistant rather than dive-rated. So treat the swimming claim as secondary to the sleep job. Buy it if you're a side sleeper, a shift worker, a commuter who naps, or someone who wants buds nobody can see. Skip it if you need guaranteed all-day battery figures, onboard storage for phone-free playback, or serious noise cancellation.
• Best for swimming → LOBKIN. IP68 versus IPX6, plus 32GB of MP3 storage that removes the need for a phone entirely.
• Best for sleeping on your side → Piegricdiat. Skin-soft silicone tips and a low-profile in-ear shape are the whole reason this product exists.
• Best for battery transparency → LOBKIN. A stated 10 hours of playback and a 2-hour magnetic charge; Piegricdiat lists a 1-hour charge time but no runtime figure.
• Best for hearing your surroundings → LOBKIN. Open-ear bone conduction keeps your ears clear; Piegricdiat's passive seal does the opposite.
• Best for blocking sound → Piegricdiat. An in-ear seal plus passive noise cancellation versus LOBKIN's deliberate openness.
• Best for accidental-touch protection → Piegricdiat. Sleep mode disables the buttons entirely.
• Best for phone-free listening → LOBKIN. Without onboard memory, Piegricdiat needs a paired device within Bluetooth range.
• Best for discreet, invisible wear → Piegricdiat. Bone conduction hooks are visible by nature.
• Best for wet-hand control → LOBKIN. Physical push buttons beat a touch surface when your fingers are soaked.
• Best for workout durability → LOBKIN. A titanium alloy frame and skin-friendly coating built to survive sweat and deformation.
If I were buying for myself, I'd take the LOBKIN Bone Conduction Swimming. In my opinion it covers more ground: it swims, it runs, it cycles, it holds thousands of tracks so I can leave my phone in a locker, and IP68 plus a 10-hour rating is the more confidence-inspiring combination for anything wet or sweaty. The Piegricdiat is genuinely better at exactly one thing — sleeping comfortably on your side in total discretion — and if that's your problem, nothing about an open-ear hook frame will solve it. So my honest call: LOBKIN for motion and water, Piegricdiat for pillows and quiet offices. Before either purchase, check the current price on Amazon, since that's the variable most likely to change your mind.
FAQ
That's what they're designed for. The buds use skin-soft silicone tips and sit small and flat in the ear, and sleep mode disables the buttons so turning over won't trigger a command. It's the clear pick over a hooked bone conduction frame for bed use.
No. That's the point of the 32GB memory — load your tracks beforehand and switch to MP3 mode, because water blocks Bluetooth transmission. For running, cycling or calls, Bluetooth 5.4 handles the connection.
Piegricdiat, by design. Its in-ear seal plus passive noise cancellation reduces outside sound. LOBKIN uses open-ear bone conduction specifically to let ambient sound through, and the spec sheet lists no active noise control at all.
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