Slow mornings, sorted.
Styled by Kalmi · Brand photography
- 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
Cordless heat & massage belt
Warmth that goes where you go.
The hot-water bottle, upgraded. Soothing warmth and gentle massage in one cordless belt, so period days and chilly evenings don't have to mean staying on the sofa.
- Made for period days
- No refills, no cables
- Heat + massage in one
Shop the belt
Free tracked UK delivery · 100-day money-back guarantee
Sound familiar?
The usual fixes don't come with you.
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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.
Everything you love about a hot-water bottle. None of the refills.
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Warmth you choose
Five heat settings, up to 60°C, so it's cosy, never too much. Change it any time.
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Gentle massage built in
Five massage modes for extra comfort alongside the warmth.
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No refills. No cables.
Charge by USB-C, then wear it cordless around the house, at your desk or out for the day.
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Discreet, front or back
Slim enough for under a loose jumper. The strap sits across your lower abdomen or lower back.
Made for real days at home.
Kalmi brand photography.
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Warmth for the sofa and beyond.
Styled by Kalmi · Brand photography
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Desk days, made cosier.
Styled by Kalmi · Brand photography
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Study sessions, without the kettle runs.
Styled by Kalmi · Brand photography
How it works
Ready in three steps.
Wrap
Fasten the strap around your lower abdomen or lower back. It sits neatly under loose clothes.
Choose
Pick your heat level and massage mode, and change them whenever you like.
Carry on
No cable to a socket, so you can get on with your day at home, at work or out.
Find your belt
Money-back guarantee · Free tracked UK delivery
Kalmi vs the hot-water bottle.
Compared with a standard, non-electric hot-water bottle.
Feature
Heat belt
Hot-water bottle
Heat control
Five settings, up to 60°C
Depends on the water you pour in
Massage
Five massage modes
None
Power
USB-C rechargeable
Refilled with hot water
Wearable
Adjustable elastic strap
Held or tucked in place
Heat over time
Stays warm while charged
Cools as the water cools
Guarantee
100-day money-back guarantee
Varies by retailer
The thoughtful gift
A gift she'll use every month.
For your partner, your sister, your best friend, or yourself. Kalmi is the cosy, practical present for anyone who reaches for a hot-water bottle on period days or chilly evenings.
Choose the Duo and there's one for each of you. Add a gift note in your basket and we'll send it straight to their door with free tracked UK delivery.
Choose a gift bundle
100-day money-back guarantee, so there's no risk if it's not quite right.
- Made for period days
Kalmi Cordless Heat & Massage Belt – Wearable Heating Pad
Soothing warmth for period days and every day, wherever you go.
£55.99
£119.98
Save 53%
- Five heat settings, so you choose the warmth
- Five gentle massage modes built in
- Cordless and USB-C rechargeable for wear on the go
Usually dispatched within 1–2 working days
Order · Dispatch · Tracked UK delivery in 4–7 working days
Choose your bundle£27.99 per belt
- Free tracked UK delivery
- 100-day money-back guarantee
- Gift note available at checkout
The details that make it comfortable.
Simple controls on top, soft fleece against you.
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The small details that add up.
- 5 Heat settings
- 5 Massage modes
- USB-C Rechargeable
- 100days Money-back guarantee
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. It's practical, cosy and gets used again and again. 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.
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.
Can I wear it under clothes?
It's slim and light enough to sit under most loose-fitting clothing.
How long does delivery take?
Orders usually dispatch within 1–2 working days. Tracked UK delivery takes 4–7 working days.
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.
Where is Kalmi based?
Kalmi is a UK brand. We ship across the UK with free tracked delivery, and a real person answers every email.
Is it suitable for everyone?
It's a comfort product, not a medical device. 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