We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-06 · 6 min read · Independent comparison
If you want earbuds that disappear into your ears and stay comfortable through a whole night of side-sleeping — a genuinely purpose-built pair of earbuds for sleeping — choose Piegricdiat Invisible Sleep Headphones; if you need an open-ear headset that survives real swimming and long rides in sweat and rain, choose RELAXYO Swimming Bone Conduction.
• Piegricdiat's biggest strength: a tiny in-ear design with soft silicone tips and caps, a sleep mode that locks the buttons so you can't trigger them by rolling over, and an IPX6 rating that the listing says handles continuous underwater use for more than six hours.
• Piegricdiat's biggest trade-off: passive noise cancellation only (no active noise cancelling), and no stated playtime figure — so long listening sessions depend on how you use them.
• RELAXYO's biggest strength: an IPX8 rating, Bluetooth 5.4, a bone conduction driver that leaves your ear canal open, and 32GB of built-in MP3 storage with 7 hours of playtime.
• RELAXYO's biggest trade-off: bone conduction sends vibration through your cheekbones, which is great for awareness on a bike but not for blocking out sound — and it's a hook-style open-ear fit, not something you'd want pressed against a pillow.
• Pick Piegricdiat if your priority is sleep and hiding earbuds in plain sight.
• Pick RELAXYO if your priority is swimming, cycling and marathon-style training with your ears open to traffic.
This is a sleep-first product, and the design choices say so. The eartips and eartip caps are made from a skin-soft silicone, and Piegricdiat built the whole thing around not pressing into your ear when you lie on your side. That's the exact failure point of normal earbuds: you roll over, the bud jams into the pillow, and you wake up with a sore ear. The small, discreet shape is meant to sit quietly in place instead, which is also why it works as an "invisible" bud at a desk or in a shared room.
The sleep mode is the detail I like most. Once it's on, every physical button is disabled and you control playback from your phone only. If you've ever woken up because your cheek pressed a volume button at 3 a.m., you understand why that matters. There's no volume-limiting clip mentioned in the specs, so if you specifically want volume limiting clip on earbuds for sleeping, that's a separate accessory decision, not something built into this pair. What you do get is Bluetooth 5.3 for a stable, low-delay connection, a built-in noise reduction microphone for calls, and passive noise cancellation that relies on the seal of the tips rather than electronics.
Who should buy it: side sleepers, people who want something invisible at work, and anyone who wants a small, comfortable in-ear bud for all-day music without the soreness that comes from jamming tips into the ear canal. The IPX6 rating and the claim of more than six hours underwater also make it a reasonable pick for swimming, surfing or snorkeling if you want a single tiny bud for both the pool and the pillow.
Who should skip it: riders who need to hear traffic. There's no transparency mode in the specs, and passive isolation plus a deep-ish fit is the opposite of what you want on a busy road.
RELAXYO takes the opposite approach: nothing goes in your ear at all. The X7 uses a bone conduction driver in a hook-shaped open-ear frame, so your ear canal stays completely open. On a bike, that's the whole point — you hear your audio and the world around you at the same time. The IPX8 rating is a step above IPX6 and covers sweat, rain, and being submerged, which is why the listing names marathon running, swimming, cycling and hiking as the target activities. RELAXYO also notes you should switch from Bluetooth to MP3 mode when swimming, since Bluetooth doesn't travel through water.
That 32GB of built-in MP3 storage is the feature that separates it from almost any ordinary Bluetooth earbud. You load your own tracks, switch modes, and the headset keeps playing with no phone and no wireless signal — exactly what you need in a pool. Bluetooth 5.4 handles the normal wireless case for riding and running, and the stated battery life is 7 hours per charge, which is enough for a long ride or a full training block without hunting for a cable.
Who should buy it: swimmers who want music in the water without a pouch, cyclists and runners who refuse to block their hearing, and anyone doing long outdoor sessions in bad weather. The black hook design is meant to sit over the ear rather than inside it.
Who should skip it: sleepers. Bone conduction vibrates against your head, and an open-ear hook is not built to lie flat against a pillow. If your main goal is the best wireless earbuds for sleeping, this isn't that product.
• Best for sleeping and side sleepers → Piegricdiat Invisible Sleep Headphones. Soft silicone tips, a sleep mode that disables the buttons, and an in-ear shape that won't fight your pillow.
• Best for swimming without a phone → RELAXYO Swimming Bone Conduction. IPX8 plus 32GB of onboard MP3 storage means no Bluetooth and no device needed in the water.
• Best for cycling and road awareness → RELAXYO Swimming Bone Conduction. Open-ear bone conduction keeps traffic audible; that's a safety feature, not a compromise.
• Best for staying hidden at work → Piegricdiat Invisible Sleep Headphones. The buds are designed to sit discreetly in the ear, and sleep mode prevents accidental taps.
• Best for defined battery expectations → RELAXYO Swimming Bone Conduction. It states 7 hours of playtime; Piegricdiat doesn't publish a playtime figure at all.
• Best for call clarity → Piegricdiat Invisible Sleep Headphones. It includes a built-in noise reduction microphone; RELAXYO's specs list no noise control and describe a driver aimed at audio playback.
• Best for newer wireless standard → RELAXYO Swimming Bone Conduction with Bluetooth 5.4, versus 5.3 on the Piegricdiat.
• Best for blocking out sound → Piegricdiat Invisible Sleep Headphones. Passive noise cancellation from a sealed in-ear fit beats an open-ear design for quiet.
If I had to pick one, I'd buy the Piegricdiat Invisible Sleep Headphones. In my opinion, comfort through the night is the hardest thing to get right in a sleep earbud, and the combination of soft silicone tips, a deliberately small in-ear shape, and a sleep mode that kills the buttons shows the design was aimed at exactly that problem. The IPX6 rating also gives it a second life in the water. I'd choose the RELAXYO Swimming Bone Conduction instead if cycling or open-water training is your real use case, because IPX8, 7 hours of playtime, 32GB of offline music and an open ear are worth far more than a night-friendly fit when you're on a bike or in a pool.
Piegricdiat. It's built around side sleepers, with skin-soft silicone eartips and eartip caps plus a sleep mode that disables the buttons so a roll-over doesn't change your music.
Yes — that's its main purpose. It carries an IPX8 rating, and RELAXYO advises switching from Bluetooth to the built-in 32GB MP3 mode while swimming, since Bluetooth won't work underwater.
RELAXYO states 7 hours of playtime. Piegricdiat doesn't publish a playtime figure, so treat battery life as the unknown here and plan on charging between uses; the stated charge time is about 1 hour.
Both are sold through Amazon, and pricing moves around, so use the button on this page to check the current price on Amazon before you decide. Compare that against the features that actually matter to you — sleep comfort versus open-ear water and road use.
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