We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-30 · 6 min read · Independent comparison
If you want a comfortable, fabric headband that doubles as sleep and workout gear with long battery life, choose MUSICOZY Headband Sleep Headphones; if you need an open-ear, fully waterproof headphone for swimming laps with built-in MP3 storage, choose RELAXYO Swimming Bone Conduction.
• MUSICOZY Headband Sleep Headphones — biggest strength: a soft, breathable spandex-nylon headband with on-ear 32mm dynamic drivers, Bluetooth 5.4, and up to 14 hours of playtime off a 1.5-hour charge.
• MUSICOZY Headband Sleep Headphones — biggest trade-off: it's a fabric headband, not a waterproof swimming device, so it's built for sleep, gym, jogging and yoga rather than the pool.
• RELAXYO Swimming Bone Conduction — biggest strength: an IP68 waterproof open-ear hook design with bone conduction drivers, Bluetooth 5.4, 32GB of onboard MP3 storage and about 7 hours of playtime.
• RELAXYO Swimming Bone Conduction — biggest trade-off: shorter battery life than the headband, no noise control, and it needs a manual Bluetooth-to-MP3 mode switch before you get in the water.
• Who each pick is for: the MUSICOZY headband suits sleepers, side-sleepers, gym-goers and travelers who want audio woven into fabric; the RELAXYO X7 suits swimmers, surfers and open-ear athletes who want sound without anything blocking their ears.
The MUSICOZY Headband Sleep Headphones solve a very specific problem: wearing headphones in bed without a hard plastic band digging into your skull or your pillow. Because the drivers sit inside a stretchy spandex-nylon fabric headband, there's no rigid arc pressing against your head when you lie down. The material is described as highly elastic, breathable and sweat-absorbent, which is exactly the combination you want for something that lives on your head for hours at a time — whether that's overnight, through a long flight, or across a sweaty yoga session.
On the audio side, MUSICOZY fits 32mm dynamic drivers tuned for a 20 Hz to 20,000 Hz frequency range at 32 ohms impedance, paired with Bluetooth 5.4 for wide device compatibility. The brand's own description talks about balanced output with present bass and clear mids, and that's a reasonable expectation for a fabric on-ear design aimed at casual listening rather than critical monitoring. There's a built-in microphone for calls, and controls run through push buttons rather than touch, which is the more forgiving choice when you're half asleep or wearing the band over your ears in the dark.
Who should skip it? If your priority is swimming, this isn't the tool. It's designed around sleep, sport and relaxation, and the breathable fabric construction is built for sweat, not submersion. Anyone who wants an open-ear fit that keeps the ear canal completely uncovered should also look at the other option below.
RELAXYO Swimming Bone Conduction: Who It's For
The RELAXYO Swimming Bone Conduction headphones — model X7 — are built around water. The IP68 rating is the core of the pitch: it's designed to shrug off sweat and rain, and the brand explicitly positions it for swimming, surfing, running, fishing and hiking, worn comfortably with a swim cap or goggles. The hook-style open-ear design means the drivers sit outside your ear canal and transmit sound through bone conduction, so your ears stay open to your surroundings while you move.
The single most important detail is the 32GB of built-in MP3 storage. Bluetooth doesn't travel through water, and RELAXYO addresses that head-on: you switch the headphone from Bluetooth mode to MP3 mode before swimming, and it plays from its own internal library. That's the difference between a waterproof headphone and a genuinely swimmable one. You load your own tracks, and the headset stops depending on a phone that's sitting on the pool deck.
The rest of the spec sheet is lean and focused. Bluetooth 5.4 for wireless listening on land, bone conduction drivers, a black open-ear hook fit, no noise control, and roughly 7 hours of battery life. There's no microphone mentioned, no noise cancellation, and no touch controls to speak of. It's a purpose-built athletic device: you trade battery hours and a bit of acoustic fullness for the ability to wear it underwater.
In my opinion, this is the pick for lap swimmers, open-water swimmers, surfers and anyone who runs or cycles and wants to hear traffic and conversation around them. It's a poor fit for sleeping — the rigid hook frame isn't designed to be pressed into a pillow — and it's not the choice if you want maximum listening time per charge or a fabric band that absorbs sweat.
• Best for swimming → RELAXYO Swimming Bone Conduction. IP68 waterproofing plus 32GB of onboard MP3 storage is the only combination here that actually works in a pool.
• Best for sleep and side-sleeping → MUSICOZY Headband Sleep Headphones. Soft, stretchy spandex-nylon fabric instead of a rigid hook frame.
• Best battery life → MUSICOZY Headband Sleep Headphones. Up to 14 hours versus roughly 7 hours on the RELAXYO.
• Best for hearing your surroundings → RELAXYO Swimming Bone Conduction. Open-ear bone conduction keeps your ear canal clear; the MUSICOZY sits on the ear.
• Best for calls → MUSICOZY Headband Sleep Headphones. It has a built-in microphone; the RELAXYO spec sheet doesn't list one.
• Best for gym, jogging and yoga → MUSICOZY Headband Sleep Headphones. Sweat-absorbent fabric and a stretchy fit made for movement.
• Best for running, cycling and hiking in the rain → RELAXYO Swimming Bone Conduction. IP68 protection against sweat and rain with an open-ear hook that stays put.
• Best for phone-free workouts → RELAXYO Swimming Bone Conduction. The 32GB MP3 mode means you can leave the phone behind entirely.
If I had to pick one, I'd buy the MUSICOZY Headband Sleep Headphones for general everyday use. It covers more of the situations most people actually face — sleep, travel, meditation, gym sessions and casual listening — with up to 14 hours of playtime, a microphone, and a fabric design that's comfortable for long stretches. In my opinion, it's the better all-rounder.
The RELAXYO Swimming Bone Conduction wins on one thing that nothing else here can match: it works in the water. If you swim, surf, or train in the rain and want your ears open, buy that one instead. They're not really competitors — they're two different jobs.
No. It's built for sleep, gym, jogging, yoga and relaxation with breathable, sweat-absorbent fabric. For swimming you want the RELAXYO, which carries an IP68 waterproof rating and an MP3 mode that keeps playing once Bluetooth drops out underwater.
Yes. They include 32GB of built-in MP3 storage, so you can load songs and switch to MP3 mode — which is exactly what RELAXYO recommends before you get in the water. Bluetooth 5.4 handles wireless listening on land.
MUSICOZY advertises up to 14 hours of continuous playtime from a charge of about 1.5 hours. RELAXYO lists roughly 7 hours of average battery life. If battery life matters most, the headband is the clear choice.
The MUSICOZY. Its soft, elastic spandex-nylon headband is designed to be worn lying down, while the RELAXYO's open-ear hook frame is shaped for swimming, running and cycling rather than resting against a pillow. If price is a factor for you, check the current price on Amazon for each before deciding.
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