Charge without unwrapping
The USB-C puck snaps on magnetically. Top it up at your desk with the belt still on, then pull it away when you stand up.
Cordless warmth · Made for period days
Carry your warmth with you.
Ember is a cordless heat belt built for the days your body asks for softness. Three levels of gentle warmth, three massage modes, and a fit quiet enough to wear under a jumper at your desk.
Shop Ember
$34.90
- Free shipping to US, UK & CA
- 30-day returns
- 12-month warranty
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3 warmth levels
Charges without unwrapping
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Why Ember exists
It started with a hot water bottle that never stayed hot.
Ember began with a familiar, unglamorous problem: the thing that helps most keeps you tethered. A bottle goes cold in twenty minutes. A heat patch lasts one day and then it's rubbish. An electric pad works beautifully — as long as you never leave the sofa.
So we built the version that comes with you. A belt that holds a set temperature instead of fading, that charges through a magnetic puck without ever coming off, and that sits flat enough to forget you're wearing it.
One product. We'd rather make it properly than make ten of them.
6 hrs
On a charge, lowest setting
3.5 mm
Thin enough to hide under knitwear
25–43"
Adjustable waist range
We wanted the kind of warmth you don't have to plan your afternoon around.
The Ember team
What's inside
Four decisions that changed how it feels to wear.
We spent the design budget on the parts you actually touch: the charge point, the heat spread, the strap, and the silence.
Three levels of warmth
104°F, 122°F and 140°F. The heating film spreads warmth across the whole panel rather than pooling it in one hot spot.
Three massage modes
A soft, steady vibration you can run on its own or alongside the heat. Quiet enough to keep on in an open-plan office.
Sits under your clothes
3.5 mm thick with a matte, low-friction face. Fits waists from 25" to 43" and disappears under a jumper or a loose shirt.
The ritual
Three steps, then get on with your day.
No app, no pairing, no cable running down your leg. One button does everything.
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Wrap it on
Fasten the belt low across your abdomen or lower back. The strap adjusts from 25" to 43", over clothes or against skin.
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Choose your setting
Hold the button for two seconds to wake it. Tap through three warmth levels, hold again to add one of three massage modes.
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Carry on
Commute, cook, sit through a meeting. When the battery runs low, snap the magnetic puck on and keep wearing it while it charges.
See it in use
Sixty seconds, start to finish.
Unbox it, wrap it on, find your setting — and what it looks like under a jumper.
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Honestly compared
How Ember differs from what you're using now.
A feature comparison, not a claim about how anyone feels. Hot water bottles and heat patches are good things — they just tie you to a kettle or a bin.
| Ember | Hot water bottle | Disposable heat patch | |
|---|---|---|---|
| Cordless while in use | Yes | Yes | Yes |
| Holds a steady temperature | Yes | No | No |
| Adjustable heat levels | 3 levels | No | No |
| Massage modes | 3 modes | No | No |
| Wearable under clothes | Yes | No | Yes |
| Hands free while moving | Yes | No | Yes |
| Charges without removing it | Yes | No | No |
| Reusable | Yes | Yes | No |
Choose your ritual
One for you, or one for every bag you own.
Most people end up wanting a second — one that lives at work, or at a partner's place, so it is never the thing they forgot.
One belt
The starting point
$34.90
- Ember belt in your choice of colour
- Magnetic USB-C charge puck
- Travel pouch
Two belts
One for home, one for your bag
$59.90
$69.80- Two belts, mix any colours
- Two charge pucks
- Two travel pouches
Three belts
Yours, and two to give
$79.90
$104.70- Three belts, mix any colours
- Three charge pucks
- Three travel pouches
- Gift-ready boxes
All packs ship free to the US, UK and Canada.
In their words
What people tell us after the first month.
SAMIRA
WOW
SAMIRA
JULI
Three sentences works well: what the day was like, what they did with Ember, and one small specific detail.
Juli
CHANG
One four-star review with an honest reservation makes the whole page more believable than nine perfect ones.
CHANG
Around 6 hours on the lowest warmth setting and roughly 3 hours on the highest, longer again if you use massage on its own. A full charge over USB-C takes about 2 hours. Because the charge puck is magnetic, you can plug in and keep wearing it.
Yes — that is what it was designed for. The belt is 3.5 mm thick with a matte face, and the strap adjusts from 25" to 43". Most people wear it over a thin layer rather than directly against skin, which also keeps the fabric fresher between washes.
Three settings: 104°F, 122°F and 140°F (40°C, 50°C, 60°C). The heating film spreads warmth across the panel rather than concentrating it in one spot, and the belt shuts off automatically after 30 minutes on the highest setting.
We don't recommend sleeping in it. Ember has an auto-shutoff, but heat devices are best used while you're awake enough to notice how your skin feels. If you have reduced skin sensitivity, a pacemaker or an implanted device, or you're pregnant, please speak to a healthcare professional first.
Free tracked shipping to the US, UK and Canada. Orders leave within one business day and typically arrive in 7–12 business days. You'll get a tracking link by email as soon as it ships.
Return it within 30 days of delivery, unused and in its box, and we'll refund the order. The battery and heating element are covered by a 12-month warranty. Email us and we'll send a return label.
One product, made properly
Warmth that comes with you.
Free shipping to the US, UK and Canada. Thirty days to change your mind, and a year of warranty behind it.
Ships in 1 business day · Tracked delivery