- Free tracked UK delivery
- 100-day money-back guarantee
- The cosy gift she'll actually use
- Dispatched in 1–2 working days
Cordless heat & massage. Made for period days. The hot-water bottle, upgraded. A gift she'll use every month
- Made for period days
Kalmi Cordless Heat & Massage Belt – Wearable Heating Pad
Soothing warmth for period days and every day, wherever you go.
- Five heat settings, so you choose the warmth
- Five gentle massage modes built in
- Cordless and USB-C rechargeable for wear on the go
- Free tracked UK delivery
- 100-day money-back guarantee
- Dispatched in 1–2 working days
Can I use it during my period?
Yes. Lots of people wear Kalmi on period days for soothing warmth while they get on with things, at home, at work or out.
How does it work?
Heat and gentle massage in one wearable belt. Switch it on, pick a heat level and a massage mode, and wear it where you want warmth. See the full guide.
What settings are there?
Five heat settings, reaching up to 60°C at the top level, plus five massage modes.
How do I wear it?
Fasten the elastic strap around your lower abdomen or lower back. It's slim enough to sit under most loose-fitting clothes.
Safety and safe use
Please read the user guide before first use. Start on the lowest heat setting and build up to what feels comfortable.
- Wear it over a thin layer of clothing rather than directly against bare skin.
- Don't use it while sleeping, and don't use it on broken, numb or irritated skin.
- Check your skin now and then, and stop if anything feels too hot or uncomfortable.
- Charge it only with the cable provided, and don't wear it while it's charging.
If you're pregnant, have a medical condition, reduced sensation or an implanted device such as a pacemaker, check with your GP before use.
Delivery and returns
Orders usually leave us within 1–2 working days, with free tracked UK delivery in 4–7 working days. Every order is covered by our 100-day money-back guarantee.
Is it a medical device?
No. It's designed for everyday comfort and isn't intended to diagnose, treat or cure any condition. If you have a medical condition, are pregnant or have reduced sensation, check with your GP or pharmacist before using any heat product.
Comfort that comes with you.
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Wear it through your day
Stay comfortable on period days and every day, at home, at work or on the move.
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Heat and massage in one
Adjustable warmth and gentle massage in a single cordless belt.
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No cables, no refills
USB-C rechargeable, so there's nothing to plug in while you wear it.
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Fits front or back
The elastic strap adjusts for your lower abdomen or lower back.
Period days, the usual way
Comfort shouldn't need a kettle.
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It goes cold
A hot-water bottle starts losing heat the moment you fill it.
Refill, wait, repeat.
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It ties you down
Plug-in heat pads keep you within reach of a socket.
Hard to use on the move.
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It does one thing
Most options give you warmth or massage, rarely both at once.
Two gadgets, one tired you.
Warmth you adjust, not just switch on.
- 5 heat settingsUp to 60°C at the top level. Choose what feels right.
- 5 massage modesGentle massage alongside the warmth.
The diagram shows how the warmth steps up as you change the setting. It doesn't measure pain or relief, so pick the level that feels comfortable and change it whenever you like.
Money-back guarantee · Free tracked UK delivery
Where it fits in.
Nothing to refill, no cable to the wall, and the settings stay in your hands.
- USB-Ccharging Recharge with the cable in the box
- ~8hours Battery life, depending on settings
- 100days Money-back guarantee
The details that make it comfortable.
Simple controls on top, soft fleece against you.
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How it compares with a hot-water bottle.
Compared with a standard, non-electric hot-water bottle.
Questions, answered.
The practical bits, from charging to delivery.
Can I use it during my period?
Yes. Lots of people wear Kalmi on period days for soothing warmth while they get on with things, at home, at work or out.
Is Kalmi a good gift?
It's one of the most thoughtful things you can give someone who reaches for a hot-water bottle every month. Add a gift note in your basket and we'll send it straight to them.
Can I use heat and massage together?
Yes. Run them together for warmth and gentle massage in one.
What settings are there?
Five heat levels, reaching up to 60°C at the top level, and five massage modes.
How do I charge it, and how long does it last?
It charges with the USB-C cable in the box. A full charge lasts up to around 8 hours depending on the settings; higher heat and stronger massage use more battery.
Will it fit me?
The elastic strap adjusts to fit most body shapes and sizes.
Can I wear it on my lower back?
Yes. Wear it across your lower abdomen or around your lower back.
Can I wear it under clothes?
It's slim and light enough to sit under most loose-fitting clothing, at home, at work or on the go.
What's in the box?
The belt, a USB-C charging cable and a user guide.
How long does delivery take?
Orders usually dispatch within 1–2 working days. Free tracked UK delivery takes 4–7 working days, and you'll get a tracking link by email.
What if it's not for me?
Every order is covered by our 100-day money-back guarantee. If it's not right for you, or for the person you gifted it to, contact us within 100 days and we'll arrange a return and refund.
Is it suitable for everyone?
It's a comfort product, not a medical device, and isn't intended to diagnose, treat or cure any condition. If you're pregnant, have a medical condition, reduced sensation or an implanted device such as a pacemaker, check with your GP first. Don't use it while asleep.
Kalmi Cordless Heat & Massage Belt – Wearable Heating Pad