Unknot. Cordless infrared heat for whatever's tight.
Unknot Heat Belt
Unknot Heat Belt
Warmth that moves with your day — cramps, desk, or the drive home.
The Unknot Heat Belt gives you cordless heat and a vibration mode you can park on the exact spot that's tight — under a shirt, at your desk, or in the car.
Launch price. One belt and a carry case.
30-day money-back guarantee · 1-year warranty · Free shipping · A real person replies within a day
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Free shipping, and the launch price needs no code.
Cordless heat that goes on under your clothes and stays warm while you move.
Three heat levels on a panel that holds its temperature.
Vibration mode you can put exactly where it's tight.
Fits the twenty minutes you actually have, at your desk, in the car, or on the couch.
Free shipping. Orders ship within 2 business days; allow 7–14 days for delivery during our launch run. Tracking is emailed the moment it ships.
Unknot Heat Belt
What it's for
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For the cramps day you can't take off.
This is for the version of that day where you're at work, not the version where you're home and horizontal. It goes on under your clothes and stays warm while you keep moving, and nobody has to know it's there.
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Lower back tightness after training, the drive, or a full day in a chair.
A day of sitting leaves the whole lower back tight, and a hard session the night before doesn't help. The Unknot Heat Belt wraps the whole span instead of pressing on one point, so you can wear it on the drive home instead of waiting until you're out of the car.
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Vibration you can put exactly where it's tight.
There are three vibration modes, and they run with the heat or on their own. Slide the belt until the motor sits over the knot, then leave it there with both hands free.
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For winding down, even if you fall asleep in it.
Low heat and low vibration for the last twenty minutes of the evening, on the couch or in bed. The auto shut-off ends the session on its own, so you don't have to stay awake to switch it off.
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Warm in the twenty minutes you actually have
Twenty minutes of warmth sounds cheap until you add up what it actually costs you: twenty minutes lying down, next to an outlet, doing nothing else.
On an ordinary day you can afford that. On the days you'd actually want it — after training, after nine hours in a chair, after two hours of traffic, or on a cramps day — there isn't a spare twenty minutes anywhere in the day. So the warmth is only available to you on the days you need it least. That isn't a discipline problem, it's a scheduling one, and the schedule was set by the product.
You already know heat works, and I'm not going to spend your time arguing about it. I'm a data analyst: I sit for nine hours, I drive about two and a half, and I train jiu-jitsu five nights a week. I own a corded heating pad that works perfectly well in the closet where it lives, and that's the whole problem with it.
The idea behind the Unknot Heat Belt is that you get warm during the day instead of waiting until it's over. You strap it on, pick a heat level, and carry on with whatever you were already doing.
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There's no cord, and nothing to remember to switch off
Six feet of cable turns out to be a fairly strict rule about where you're allowed to be. One hand ends up holding the pad in place, so you can't type. The cable catches in the wheels of a desk chair, so you tuck it underneath you and stop moving. And in plenty of workplaces — dispatch desks, shop floors, anywhere with an approved-devices list — you can't plug anything in at all.
Every one of those is a workaround, and in every one of them you're the one adapting to the product. The cord is the thing that should have changed, not you.
The Unknot Heat Belt charges over USB-C and then goes wherever you go, so there's no outlet to find, nothing to trip over and nothing to get approved. It also ends the session on its own, so you don't have to stay awake to switch it off — the auto shut-off cuts the heat whether you remembered it or not.
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You get to stay in the room
Getting warm has usually meant leaving the room. The floor, the spare bedroom, the end of the couch nearest the outlet. Being warm and being with people were two separate plans, and most nights the people won.
The belt is thin and sits flat under a shirt, so you can wear it through a meeting, at the dinner table, in the passenger seat, in the stands, or on the mat between rounds. Nobody at the table has to know why you're suddenly good company again.
Under a jacket you can't see it at all, and under a t-shirt it reads as a belt, which is what it is.
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Showing up on the days you used to write off
There's a kind of day you decide about in advance: the one you quietly cancel the night before, the training session you skip because the drive home already used you up, the day of the month that has historically taken the whole day.
Most streaks don't break on the hard days; they break on the days you decided ahead of time were going to be hard. A charged belt in your bag takes that decision away from you, because the reason to cancel — that you'd have to stop everything for twenty minutes — stops being true.
That only counts if it's still working in six months. Cheap cordless belts fail in a predictable order: the USB port first, then the mode button, then the battery, and the battery always goes when you're away from home on the day you packed it. Those are the three parts we built against, and every Unknot Heat Belt carries a one-year warranty against defects. If it breaks inside that year we send you a new one rather than repairing it.
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More years of the thing you like doing
Nobody decides to trade the thing they like doing for the thing they have to do. It happens one stiff drive home at a time: you skip Thursday, then Thursday and Tuesday, and a year later you train once a week and call it a schedule.
The gear that fixes this isn't the most powerful gear, it's the gear that's easy enough to keep using. Foam rollers and massage guns lose to convenience every time, and they lose for the same reason: they ask you to stop what you're doing.
I use mine twice on a normal day, once before jiu-jitsu to get loose and again in the car on the way home. Neither one asks me to stop anything, which is why I use it and why the corded pad stayed in the closet. Twenty minutes, twice a day, is about the size of a habit that survives a real schedule.
Why this one runs hot without a cord
The Unknot Heat Belt heats with a thin graphene far-infrared film — one printed panel rather than a wound wire — so the whole panel warms evenly instead of heating in a line.
The easiest way to picture the difference is a toaster and a heated blanket. A toaster glows hot in one thin line. A heated blanket warms the whole thing, evenly, on far less power. Same electricity, completely different part.
Almost every heating pad ever built, corded or cordless, cheap or expensive, is the toaster kind: a coil of resistive wire. Wire is power-hungry and it heats in a line rather than across a surface. Plugged into a wall you can cover that up with brute current, but on a battery you can't, so it runs cool, and then the battery runs out. That's where cordless heat got its reputation.
The same film has been keeping people warm inside heated jackets and gloves for years, and that is why we chose it for a belt that has to run off a battery. You get three heat levels on a panel that holds its temperature, instead of one wire switching on and off, which is why the levels on everything else feel like nothing and then too much.
Vibration for the one spot that wants pressure
Heat is a wide instrument. It warms the whole span, which is what you want on a drive home or a cramps day. Some days that isn't what you need, because there's one place about the size of a fist, low on the back and off to one side, and what it wants is something pressing on it.
That's the other half of the Unknot Heat Belt. A vibration motor sits inside the panel with three modes, and it runs alongside the heat or on its own. Slide the belt until the motor sits over the knot, pick a mode, and leave it there. Both hands stay free, so you can use it while you answer an email.
It hums rather than thumps, closer to a car seat on a rough road than a massage gun. You can feel it through a t-shirt, and you can't hear it across a quiet room, which is what you want at a desk.
I use it on the drive home on low heat and the lowest vibration mode, because the drive is where my lower back stiffens up and I'm not going to get out of the car to fix it. I also use it before training, when one spot is tighter than the rest and heat on its own is taking too long.
Warmth you'll actually use, with nothing tying you to an outlet.
$79.99 launch price, down from $99.99.
One belt and a carry case. Free shipping.
30 days to change your mind, and a 1-year warranty against defects.
Send it back for any reason, including that you just didn’t use it. We’ll email you a return label.
Shipping. Free shipping. Orders ship within 2 business days; allow 7–14 days for delivery during our launch run. Tracking is emailed the moment it ships.
Support. Email support@unknotheat.com and a person answers within a day. There’s no phone tree and no ticket number. — Ian, Pedrada Labs
Specs
Full specifications
Full specifications
Heating element — graphene infrared film
Heat levels — 3 (104–113°F / 122–131°F / 131–140°F, manufacturer-rated; our own measurement follows from the sample)
Vibration modes — 3 (supplier-stated), run with the heat or on their own
Charging — USB-C
Auto shut-off — yes, ends the session on its own
Fit — adjustable strap, worn on the lower back or across the lower abdomen
Certifications — CE / RoHS (supplier-stated; FCC report requested)
In the box — belt, USB-C cable, carry case, quick-start card
Temperatures, heat-up time, battery hours, charge time, shut-off minutes, waist range, thickness and weight are measured from the launch sample and published here before the first order ships. Until then, the heat-level figures are the maker's ratings, not ours.
FAQ
Will I actually feel it?
Will I actually feel it?
Yes. The panel warms evenly across the whole span rather than in a hot stripe, and it holds its temperature instead of swinging between too much and nothing. Level 1 or 2 is comfortable against skin, and level 3 is better over a thin layer.
How long does a charge last?
How long does a charge last?
Long enough for a commute and an evening on the medium setting. It charges over USB-C. The measured hours go in the spec table once the launch sample has been through a full run-down, and we won't publish a number before then.
Can I wear it in a meeting without anyone noticing?
Can I wear it in a meeting without anyone noticing?
Yes, and that's most of the point. It's thin and sits flat under a shirt, and on the lowest vibration mode you can feel it while the room can't hear it.
Can I fall asleep in it?
Can I fall asleep in it?
Yes. The auto shut-off ends the session on its own, and there's no cord running to a wall socket. We'd still suggest a lower setting overnight.
What does the vibration actually do?
What does the vibration actually do?
It gives you something you can aim at one spot. The heat covers the whole span and the motor covers one place, and you position it by sliding the belt until the motor sits where you want it. There are three modes, and they run with the heat or on their own.
Can I use it on a cramps day?
Can I use it on a cramps day?
That's one of the situations we shaped it for. It sits across the lower abdomen or the lower back, holds itself in place with the strap, and stays warm while you're standing, walking around or sitting at a desk, so you don't have to lie down. Heat and vibration run together if you want both, and what it does for you on that day is your call rather than our claim.
When will it get here?
When will it get here?
Free shipping. Orders ship within 2 business days; allow 7–14 days for delivery during our launch run. Tracking is emailed the moment it ships.
What if I don't get on with it?
What if I don't get on with it?
You have thirty days to send it back for a full refund, for any reason, including that you just didn't use it. Email support@unknotheat.com and we'll send you a return label, and a real person will answer within a day.
Will it still be working in a year?
Will it still be working in a year?
It carries a one-year warranty against defects, and if something stops working inside that year we send you a new one rather than repairing it. Cheap cordless belts fail in a predictable order — the USB port, then the mode button, then the battery — and those are the three parts we specced against.
Will it still have charge when I need it?
Will it still have charge when I need it?
This is the most common way cordless heating pads let people down. A wire coil running off a battery heats weakly and drains fast, which is the reason we built this one around a printed film instead. The measured hours go in the spec table once the launch sample has been through a full run-down.
Can I use it while it's charging?
Can I use it while it's charging?
We'll confirm that from the launch sample and update this answer before the first order ships. If you want a definite answer today: charge it first, then wear it.
Ready when you are
Be warm on a day you'd normally write off.
The Unknot Heat Belt is $79.99 at launch price, with a carry case, 30 days to change your mind, a one-year warranty and a real person on the other end of the email.
Free shipping, and the launch price needs no code.