We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-21 · 6 min read · Independent comparison
If you want a wearable headband that lets you fall asleep while listening to audio on your side, choose SleepPhones AcousticSheep Classic; if you need to turn any old 3.5mm headphone jack into a wireless Bluetooth connection for the earbuds you already own, choose Twelve South AirFly SE.
• SleepPhones Classic — biggest strength: ultra-thin flat speakers set inside a soft, machine-washable fleece headband you can actually lie on, so side sleepers can listen without bulky cans or painful earbuds.
• SleepPhones Classic — biggest trade-off: it's a wired headphone with a fixed 48-inch cord and a 3.5mm plug, so your source device has to sit within reach (and some devices need an adapter).
• AirFly SE — biggest strength: it turns a dead-end 3.5mm jack (plane seatback, gym machine, hotel TV, older stereo) into Bluetooth, pairing your existing wireless headphones with 20+ hours of battery and USB-C charging.
• AirFly SE — biggest trade-off: it produces no sound of its own. Without a pair of Bluetooth headphones or earbuds, it does nothing at all.
• Who SleepPhones Classic is for: side sleepers, light sleepers, tinnitus sufferers, and anyone who wants audio in bed without something jabbing into their ear.
• Who AirFly SE is for: travelers and gym-goers who already love their wireless headphones and refuse to go back to a corded pair.
The Classic is a different category of product than most people expect. It isn't a headphone you put on your ears — it's a fleece headband with flat, movable speakers tucked inside, sized S, M, or L (Medium fits most people). Because the speakers sit flat against the side of your head instead of inside your ear canal, you can roll onto your side and the headband just... stays there. That single design choice is the whole point, and it's why the people who love this thing tend to love it hard.
Under the hood the specs are modest and honest: 32 ohm impedance, dynamic drivers, a 20 Hz–20,000 Hz frequency range, and a 3.5mm jack on a 48-inch braided cord. There's no noise cancelling and no wireless anything. The headband doubles as an eye mask, and because the speakers are removable, the fabric goes in the washing machine — which matters more than you'd think for something that lives on your pillow. The fleece version is the warm, soft option; a lighter Breeze fabric exists for hot sleepers, so pick accordingly.
Buy it if you're a side sleeper, a light sleeper, someone with tinnitus, or someone who listens to white noise, ASMR, audiobooks, or meditation tracks at bedtime and has given up on earbuds that hurt by 2 a.m. Skip it if you need wireless freedom, active noise cancelling, or you want to walk around the house while listening — the cord tethers you to your phone or player, and some devices will need an adapter to connect.
The AirFly SE solves a completely different problem: audio that's trapped behind a headphone jack. Airplane seatback screens, gym treadmills and ellipticals, hotel TVs, the Nintendo Switch, older car stereos — all of them still hand you a 3.5mm socket and nothing else. The AirFly plugs into that socket, powers on into pairing mode (the light flashes white and amber), and connects to your Bluetooth headphones in a few seconds. After the first pairing it reconnects automatically to the same headphones.
Compatibility is broad rather than Apple-only. Any headphones that support standard Bluetooth and can enter pairing mode will work — AirPods, Sony, Bose, Beats, Galaxy Buds, and the rest. The spec sheet lists Bluetooth 5.2 with aptX and SBC support, stereo output, and touch controls for volume on the unit itself. It's tiny — roughly 1.75 inches tall and under half an inch thick, weighing about 13.6 grams — so it disappears in a pocket. Battery life is rated at 20+ hours per charge, and you can keep using it while it charges over USB-C with the included cable, which is the detail that makes long-haul flights painless.
One honest caveat from the manufacturer: hearing aids that use Bluetooth Low Energy or need a companion app won't pair, and because hearing-aid implementations vary by brand, it's worth checking with the manufacturer first. Buy it if you fly, travel, or hit the gym with wireless headphones you already own. Skip it if you're still using wired headphones — there's nothing for the AirFly to talk to.
• Best for sleep and side-sleeping → SleepPhones AcousticSheep Classic. It's the only one of the two you can physically lie on.
• Best for air travel with your own headphones → Twelve South AirFly SE. It converts seatback audio to Bluetooth and lasts 20+ hours.
• Best for gym equipment → Twelve South AirFly SE. Treadmills and machines are exactly the 3.5mm sources it was built for.
• Best for tinnitus, white noise, and meditation at night → SleepPhones Classic. Flat speakers plus an eye-mask headband make it a sleep tool, not a travel gadget.
• Best for existing wireless headphone owners → Twelve South AirFly SE. It extends gear you already like instead of replacing it.
• Best for people who hate cords → Twelve South AirFly SE. The Classic is wired by design, with a 48-inch cord and a 3.5mm plug.
• Best for washing and hygiene → SleepPhones Classic. Removable speakers mean the fleece headband is machine washable.
• Best for packing light → Twelve South AirFly SE. At under 14 grams and pocket-sized, it adds almost nothing to a carry-on.
These two don't really compete — they solve opposite problems, and that's why the choice is easy once you're honest about your habit. In my opinion, if your goal is falling asleep or lying down with audio, the SleepPhones AcousticSheep Classic is the one to buy; nothing about the AirFly SE helps you sleep, and earbuds under a pillow still hurt. If your goal is using your own wireless headphones on a plane, at the gym, or with an old TV, the Twelve South AirFly SE is the smarter buy, and the SleepPhones Classic is irrelevant to you. Buy for the moment you'll actually use it, not for the spec sheet that looks more impressive.
No. It's a wired headphone with a 48-inch braided cord and a 3.5mm plug. It connects to anything with a standard headphone jack, though some devices may need an adapter.
It works with Bluetooth headphones and earbuds that support standard Bluetooth and can enter pairing mode — including AirPods, Sony, Bose, Beats, and Galaxy Buds. Hearing aids using Bluetooth Low Energy or a companion app aren't compatible.
The AirFly SE does, by default — it's rated for 20+ hours per charge and can be used while charging over USB-C. The SleepPhones Classic has no battery at all because it draws power from the device it's plugged into.
I don't quote prices here because they change often. Check the current price on Amazon for each — the page has a button for that — and weigh it against which problem you're actually trying to solve.
Technically you could pair it with sleep headphones, but it's designed for travel and 3.5mm audio sources, not for wearing in bed. For sleep, the SleepPhones Classic is the purpose-built choice.
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