We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-25 · 6 min read · Independent comparison
If you want a lightweight everyday open-ear headphone for running, cycling and gym sessions, choose flymory Bone Conduction Headphones; if you need a fully submersible headphone you can actually swim and shower with, choose AYI Professional Swim Headphones.
• flymory's biggest strength: a flexible titanium-alloy neckband that bends a full 360 degrees, plus Bluetooth 5.3 and a 12-hour battery at moderate volume — an easy, comfortable all-day fit for land sports.
• flymory's biggest trade-off: IPX5 only. It shrugs off sweat and light rain, but it is not built to be submerged, so swimming is off the table.
• AYI's biggest strength: IP68 waterproofing with a patented sealed sound chamber rated for long submersion, plus 32GB of built-in memory so you can swim with no phone nearby at all.
• AYI's biggest trade-off: shorter stamina — around 8 hours of playtime — and a more specialized, swim-first design that is overkill if you never get in the water.
• Choose flymory if your training happens on dry land and you want long battery life, the newer Bluetooth 5.3 connection and a bendable, forgiving fit.
• Choose AYI if the pool is your main arena and you want a true bone conduction headset that keeps playing underwater without a phone.
The flymory set is built around comfort and staying aware of your surroundings. The open-ear design pipes audio through your cheekbones, which means your ear canals stay clear — you hear traffic, other runners and your surroundings while your music plays. For anyone who runs or cycles on public roads, that situational awareness is the whole point of going bone conduction in the first place.
The fit story is the standout spec here. The neckband is titanium alloy and bends a full 360 degrees, so it adapts to different head sizes rather than forcing one rigid shape on you. The ear hooks are ergonomically shaped to sit against the cheekbone, and at 29 grams the whole thing is light enough that it should stay put through strenuous movement. Add Bluetooth 5.3, which the spec sheet describes as a more stable, faster connection within roughly 33 feet, and you get a headphone that behaves well as a daily training companion.
Battery is the other headline. flymory quotes 12 continuous hours at 50% volume, dropping to about 8 hours if you push volume to 80%, with a full charge in two hours over USB-C. That is a genuinely long window for a bone conduction headset.
Who should buy it: runners, cyclists, gym-goers and commuters who want open-ear awareness, a bendable fit and long battery life. Who should skip it: swimmers. IPX5 handles sweat and small amounts of rain, not a lap pool. If you need underwater listening, look at the AYI instead.
The AYI headset is a specialist, and it says so right in the name. The headline feature is IP68 waterproofing — dustproof, sweatproof and fully submersible — backed by a patented full-seal sound chamber designed to let the headphone stay underwater for extended periods. That is a different class of water resistance from the flymory's IPX5, and it changes what you can do with the product: pool workouts, open-water swims, even showering.
The second big idea is the dual-mode playback. AYI runs Bluetooth for wireless listening, but it also has an MP3 mode with 32GB of built-in memory, which the spec sheet says can hold thousands of songs. That matters because Bluetooth signals do not travel through water — so for actual swimming, you load your music onto the headset and leave the phone on the deck. The description also mentions an ergonomic open-ear shape at roughly 0.07 pounds, keeping the ears unburdened.
The trade-off is battery. AYI lists up to 8 hours of playtime per charge with fast charging. That is respectable, but it is shorter than flymory's quoted 12 hours, and it is the price you pay for a sealed, submersible build. The Bluetooth version listed is 5 rather than the newer 5.3 on the flymory.
Who should buy it: swimmers, triathletes and anyone who wants music in the water without carrying a phone. Who should skip it: if you never swim and just want the longest battery life and the newest Bluetooth for land training, the flymory is the more natural fit.
• Best for swimming → AYI Professional Swim Headphones. IP68 and a sealed chamber rated for long submersion; the flymory's IPX5 cannot go there.
• Best for battery life → flymory Bone Conduction Headphones. Up to 12 hours at 50% volume versus roughly 8 hours on the AYI.
• Best for the newest Bluetooth → flymory. Bluetooth 5.3 versus Bluetooth 5 on the AYI, with a quoted stable range of about 33 feet.
• Best for phone-free listening → AYI. The 32GB of built-in memory lets you play music without any paired device.
• Best for a flexible, adjustable fit → flymory. The titanium-alloy neckband bends 360 degrees to suit different head sizes.
• Best for running and cycling → flymory. Lightweight open-ear build with sweat and rain resistance and no submersion need.
• Best for pool workouts and open-water swims → AYI. Fully submersible with MP3 mode so water does not block your audio.
• Best for a do-it-all land headphone → flymory. The AYI's water-first design is extra cost and complexity if you stay dry.
In my opinion, the right pick comes down to one question: do you get in the water? If you swim, I would buy the AYI Professional Swim Headphones — the IP68 rating and the 32GB MP3 mode are the only way to get real underwater listening, and no amount of battery life makes up for a headphone that cannot be submerged. If you train on land, I would buy the flymory Bone Conduction Headphones. You get the longer 12-hour battery, the newer Bluetooth 5.3 connection and a bendable titanium neckband that fits more head shapes, all for the kind of running, cycling and gym use most people actually do.
how to bone conduction earphones work
They transmit sound as vibrations through your cheekbones to your inner ear, bypassing the ear canal entirely. That is why both the flymory and AYI use an open-ear design — your ears stay unblocked so you keep hearing your surroundings. Neither set plugs or covers the ear canal.
how to wear bone conduction earphones
You rest the transducers against your cheekbones just in front of your ears, with the band or hook wrapping behind your head or over the ear. The flymory's titanium neckband bends 360 degrees to fit different head sizes, while the AYI uses an ergonomic open-ear hook shape. A snug, stable position is what keeps the vibration transferring properly.
how to use bone conduction earphones
Charge them, pair over Bluetooth, and play as normal — the flymory uses a USB-C port and Bluetooth 5.3, and the AYI uses Bluetooth 5. The AYI adds a second option: load songs into its 32GB memory and switch to MP3 mode, which is what lets you listen while swimming since Bluetooth does not travel through water.
how are bone conduction earphones different for swimming
Standard bone conduction sets like the flymory are IPX5 — fine for sweat and light rain, but not submersible. The AYI is IP68 with a sealed sound chamber rated for long submersion, so it is the one designed for pool and open-water use. If swimming is your priority, that waterproofing difference is the deciding factor.
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