1. The sole heater
A carbon-fibre heating pad in the centre of each sole warms the arch and ball of the foot and reaches comfortable temperature in about 3 to 5 minutes.
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New & Improved 2026 Version
The Heated Slippers That Warm You From the Soles Up
Tired of cold feet on chilly floors, long winter evenings, or early mornings at home? Wattoes are heated slippers that warm your feet in minutes, with no cables or plugs to deal with. Just pop in the rechargeable batteries, choose one of three heat levels, and enjoy up to 6 hours of cosy, cordless warmth wherever you go in the house.
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Wattoes are for indoor, supervised use only. Not for use while sleeping, by children, or by anyone with reduced sensation in the feet (for example diabetes or neuropathy) unless approved by a doctor. Read the manual and use only the supplied charger. Your statutory consumer rights are unaffected.
Quick answer
What are heated slippers, and are they safe?
Heated slippers are slippers with a small electric heating pad in each sole, powered by a rechargeable battery. Wattoes use a removable 2500 mAh power bank per slipper and three heat levels you choose with a button. They are designed for indoor, supervised use by healthy adults who are awake, and they are not a medical product.
Safety depends on three things: the surface temperature, how long you wear them and whether your feet can feel heat normally. Wattoes keep the sole surface between about 36 °C and 45 °C, and the guidance below explains how to use them sensibly.
- Three heat levels with LED colour
- Up to 6 hours per charge
- Hand-washable knit
What are Wattoes heated slippers?
Wattoes are cordless, battery-heated slippers in a soft ribbed knit with a thick plush lining. Each slipper has a heating pad in the centre of the sole and a zipped pocket that holds a removable power bank. There is no cable between you and a wall socket, so you can walk to the kitchen, answer the door or move from sofa to desk.
They come in two colourways, gray and apricot, and both are unisex. The upper is a 65% polyester and 35% cotton knit with a polyester plush lining, and the sole is a non-slip rubber that works on tile, wood and carpet. Each slipper weighs about 210 g with its power bank fitted, which is light enough to forget you are wearing them.
This page is both a product page and an honest guide. You will find the temperature chart, the battery maths, the groups who should not use heated footwear and a plain comparison with the alternatives, all alongside the price. If you are researching the best heated slippers, battery heated slippers or cordless heated slippers, we want you to decide with full information.
Why do feet get cold at home?
Feet are the furthest point from the heart and have a high ratio of skin to muscle, so they lose heat quickly. When the body senses cold it narrows blood vessels in the extremities to protect the core, and your feet cool first. Standing on a hard floor adds to the effect, because tile, stone and laminate pull heat out of your soles by direct contact.
Cold floors
Hard flooring conducts heat away from the foot far faster than air does. A rug helps, but slippers with their own heat source keep the sole warm even on bare tile.
Sitting still
Desk work and long evenings on the sofa mean little muscle activity in the legs. Less movement means less warmth reaching the feet, which is why many people feel it most while working from home.
Lower thermostats
Many households now run the heating lower to save energy. Warming only your feet is a targeted way to stay comfortable at a lower room temperature.
Cold feet can occasionally point to a health issue, such as poor circulation or a nerve condition. If your feet are persistently cold, change colour, feel numb or hurt, speak with a doctor before using any heated product. Wattoes are a comfort product for healthy feet, not a treatment, and we make no medical claims.
Warm where it matters
The Wattoes pad sits under the arch and ball of the foot, the area that touches the floor. Because the heat is delivered at the contact point, you feel the difference within minutes and do not need to heat the whole room.
How battery-heated slippers work
A thin electrical heating element in the sole converts battery power into heat. The element sits under the centre of the foot, where the knit lining and sock layer spread the warmth. A small controller inside the pocket switches between three power levels, and the LED on the slipper shows which level is active.
The element is a flexible carbon-fibre heating film sealed inside the sole. It is only a fraction of a millimetre thick, so you do not feel it underfoot, and it warms evenly across the pad rather than in hot spots. The controller regulates power so the temperature stays steady at the level you chose.
2. The zipped battery pocket
The power bank slides into a discreet inner pocket that keeps it secure and out of the way, and it can be removed before washing or charging.
3. The LED button
One press cycles through the heat levels. A coloured light tells you where you are, so you never have to guess.
The three heat levels
High · red light · 45 °C
Fastest warm-up for cold floors. Measured sole surface temperature is about 45 °C. Best for short periods while you are awake, then step down to Medium or Low.
Medium · blue light · 40 °C
A balanced level for sitting at a desk or on the sofa. Measured sole surface temperature is about 40 °C, which feels like a warm hand holding your foot.
Low · green light · 36 °C
Gentle background warmth and the longest run time, up to 6 hours. Measured sole surface temperature is about 36 °C, close to normal skin temperature.
Temperature control is by the button on the slipper: press once to switch on, again to change level and hold to switch off.
Who Wattoes suit: everyday moments at home
Heated slippers work best as an everyday comfort item for awake, healthy adults indoors. These are the situations where our customers use them most.
Home office
Sitting still for hours chills the feet first. Medium keeps you comfortable without raising the thermostat for the whole house.
Reading and TV evenings
Put them on Low for a gentle glow and enjoy two to three films or a long chapter on one charge.
Early mornings
Step onto a cold kitchen floor with warm soles. High warms up in minutes while the kettle boils.
Gifts for adults
Unisex sizing, two colours and ready-to-use packaging make them an easy present for partners, parents and friends who feel the cold.
Wattoes are not designed for outdoor use, sleeping, or children. If you are buying for an older relative, check that they can feel heat normally and can easily take the slippers off on their own.
How hot is too hot? Burn safety and who should not use them
Skin damage depends on both temperature and time. A surface that feels pleasantly warm for ten minutes can injure skin if it stays on for hours, particularly when the person cannot feel it clearly or is asleep. This is the main reason Wattoes are for awake, supervised, indoor use.
We designed the three levels around that evidence. The highest level is 45 °C, near the bottom of the range where injury needs several hours of continuous contact, and the lower levels sit below it. A sock layer and the plush lining add a further buffer between the pad and your skin.
Time to skin injury by contact temperature
Adult skin, continuous contact. Based on the Moritz and Henriques burn research as summarised in burn-centre tables.
44 °C
~6 hours
47 °C
~1 hour
50 °C
~3 minutes
55 °C
~30 seconds
60 °C
~5 seconds
The safety lesson: low heat for a long time can still burn. Take the slippers off if your feet feel hot, look red, or you are getting drowsy. Never wear them in bed.
Who should not use heated slippers
- Anyone planning to sleep or nap in them
- Children
- Anyone with reduced sensation in the feet, for example diabetes or neuropathy, unless approved by a doctor
- Anyone unable to remove the slippers themselves
- Anyone with open wounds, swelling or skin conditions on the feet, unless a clinician agrees
- Anyone using damaged, wet or modified slippers or batteries
Safe-use habits
- Start on Low and move up only if you need to.
- Check your feet after the first 10 minutes.
- Remove the slippers if you feel unwell, sleepy or notice redness.
- Do not sit on, fold or crush the soles while they are on.
- Stop using any slipper that is damaged, swollen or smells hot.
Questions to ask before buying any heated footwear
- What is the measured surface temperature at each level?
- Which battery chemistry is used, and is there a protection circuit?
- Are there test reports (IEC 62133-2, UN 38.3) and compliance marks?
- Are the wash instructions validated by the maker?
- Who is the EU or UK Responsible Person?
- Are return and warranty terms clear and in writing?
Battery, charging and run time
Each slipper takes its own removable 2500 mAh lithium-ion polymer power bank, so the pair carries two. At a nominal 3.7 V, 2500 mAh is 9.25 Wh per slipper, or 18.5 Wh per pair. Each bank has a protection circuit against overcharge, over-discharge, short circuit and over-temperature.
Run time falls as heat level rises, because the pad draws more power. The table shows the numbers measured on a full charge at room temperature of about 20 °C. Colder rooms and older batteries shorten run time slightly.
| Heat level | Run time | Wh per slipper | Average draw |
|---|---|---|---|
| High (red) | 2.5 h | 9.25 Wh | about 3.7 W |
| Medium (blue) | 4 h | 9.25 Wh | about 2.3 W |
| Low (green) | Up to 6 h | 9.25 Wh | about 1.5 W |
Average draw = Wh ÷ hours. Real run time varies with room temperature, battery age and fit.
Charging and battery care
- Charge only with the supplied 5 V USB-C cable and a 5 V charger. A full charge takes about 3 hours.
- Charge on a hard, non-flammable surface, awake and in sight. Do not charge overnight unattended.
- Remove the power banks before washing and let them reach room temperature before charging.
- Do not use a bank that is swollen, dented, hot or wet. Stop and contact support.
- For storage over summer, keep banks about half charged in a cool dry place.
- Recycle spent batteries at a battery collection point, never in household waste.
Dual 2500 mAh batteries. Two rechargeable
batteries for long-lasting warmth. Cells are tested to IEC 62133-2
and the packs to UN 38.3 for transport, and test reports are
available on request through our compliance documents page.
Size guide and colours
Wattoes come in Gray (EU 39–44) and Apricot (EU 34–39). If you are exactly EU 39, either colour fits: choose Gray for a roomier fit over socks, or Apricot for a closer fit. If you are between sizes, size up for thick socks, because the knit stretches a little but the sole pad does not.
| Colour | EU | US | UK | Foot cm |
|---|---|---|---|---|
| Apricot | 34–35 | W 3.5–4.5 | 2.5–3 | 21.5–22.0 |
| Apricot | 36–37 | W 5–6.5 | 3.5–4.5 | 22.5–23.5 |
| Apricot / Gray | 38–39 | W 7–8.5 / M 6–7 | 5–6 | 24.0–24.5 |
| Gray | 40–41 | M 7.5–8.5 | 6.5–7.5 | 25.0–26.0 |
| Gray | 42–44 | M 9–11 | 8–10 | 26.5–28.0 |
How to measure your foot
- Stand on a sheet of paper against a wall.
- Mark the tip of your longest toe.
- Measure from the wall to the mark in cm.
- Measure both feet and use the larger one.
Washing and care
The knit is a 65% polyester and 35% cotton blend, and the plush lining is polyester. The slippers are hand-washable once the power banks are out. Machine washing and tumble drying are not recommended, because heat and spinning can damage the heating film.
- 1
Switch off, remove banks
Unzip the pocket and take both power banks out.
- 2
Hand wash gently
Use cool water up to 30 °C and a mild detergent. Brush lightly, do not soak or wring.
- 3
Air dry fully
Press out water with a towel and dry flat for 24 hours away from direct heat.
- 4
Refit when dry
Put the banks back only when the slippers are completely dry inside and out.
Specifications
| Model | Electric heated slippers, unisex |
|---|---|
| Colours / sizes | Gray EU 39–44; Apricot EU 34–39 |
| Material | 65% polyester / 35% cotton knit; polyester plush lining; non-slip rubber sole |
| Heating area | Centre of the sole, carbon-fibre film |
| Heat levels | High (red) 45 °C; Medium (blue) 40 °C; Low (green) 36 °C |
| Battery | Removable lithium-ion polymer power bank per slipper; 3.7 V; 2500 mAh = 9.25 Wh; protection circuit |
| Charging / run time | 5 V USB-C; about 3 h; up to 6 h |
| Washable | Hand wash at up to 30 °C, banks removed |
| Intended use | Indoors; about 210 g per slipper with bank |
| In the box | 1 pair of slippers, 1 pair of power banks, USB-C charging cable, manual |
| Compliance | CE, UKCA, FCC, RCM; IEC 62133-2 and UN 38.3 reports; EU and UK Responsible Person listed in the footer; WEEE and battery registrations held |
| Warranty | 12 months in addition to statutory rights |
Heated slippers vs heated socks vs plug-in warmers vs ordinary slippers
No single option wins for everyone. This table sets out the real trade-offs, including the downsides of heated slippers.
| Heated slippers | Heated socks | Plug-in foot warmers | Ordinary slippers | |
|---|---|---|---|---|
| Cordless | Yes | Yes | No | n/a |
| Warm-up | 3–5 minutes | Minutes | Minutes | Body heat only |
| Downsides | Charging, battery care, indoor only | Wires and batteries against skin, wear | Tied to a socket, trip risk | No added heat |
| Washing | Remove banks first, hand wash | Often limited | Usually spot clean | Easy |
| Running cost | Under 1 cent per charge | Similar | Mains power | None |
| Walk around the house | Yes, with grip sole | Yes, but need shoes or slippers over them | No | Yes |
Heated slippers buying guide: what to look for
The market for heated slippers has grown fast, and quality varies widely. Whether you choose Wattoes or another brand, use this checklist to compare products on the things that matter.
01
Surface temperature
Look for stated, measured temperatures at each level. Avoid products that only say warm or hot. Anything much above 45 °C for continuous wear is a concern.
02
Battery quality
Check for lithium cell certification, a protection circuit and a removable battery. Removable packs are safer to wash, replace and recycle.
03
Test reports and marks
Look for CE, UKCA, FCC or RCM marks as relevant to your country, and for named standards such as IEC 62133-2 and UN 38.3.
04
Run time you will actually use
Brands often quote run time on the lowest setting. Compare the numbers at the level you will really use.
05
Washability and grip
A removable battery makes washing realistic, and a rubber sole keeps you safe on smooth floors.
06
Honest claims and terms
Be wary of medical claims, sleep use or all-night wear. Check that returns, warranty and contact details are written down.
Heated slippers: myths vs facts
Myth
Hotter is always better.
Fact
Comfort comes from steady warmth. Start on Low and only go higher briefly, because injury risk rises with temperature and time.
Myth
You can leave them on overnight.
Fact
Never. Wattoes are for awake, supervised use only, and not for sleeping.
Myth
Heated slippers treat medical conditions.
Fact
They are a comfort product. We make no claims about pain relief, circulation or any condition.
Myth
Cordless means weak.
Fact
Foot warming needs little power. Two 2500 mAh banks give 2.5 to 6 hours, and a pad warms to comfort in minutes.
Myth
Battery slippers cannot be washed.
Fact
With removable power banks, Wattoes can be hand washed. Never wash with the batteries inside.
Warm feet without electricity
Heated slippers work best alongside simple habits. These tips cost nothing and help whatever you wear.
Layer up
A thin moisture-wicking sock under a wool sock traps warm air better than one thick pair. Avoid tight socks that squeeze the foot.
Move often
Stand, stretch and walk for a minute every half hour. Simple calf raises get blood flowing to the feet.
Insulate the floor
A rug or mat under your desk stops cold rising from tiles or boards. Draught excluders on doors help too.
Warm from the inside
A warm drink and a proper meal help your whole body, not only your feet.
Persistently cold feet, colour changes or numbness are worth discussing with a doctor.
Power and running cost
A full pair holds about 18.5 Wh, which is 0.0185 kWh. At an electricity price of $0.20 per kWh, a full charge costs about 0.4 cents, so even daily use costs well under $2 a year. Compare that with heating a whole room: a 1,500 W electric heater uses 1.5 kWh per hour, around 30 cents an hour at the same price.
0.4¢
per full charge of a pair
~$1.50
a year if charged daily
~30¢
per hour for a 1,500 W room heater
Our recommendation: which Wattoes and which package?
After testing the slippers across rooms, floors and routines, here is what we suggest. These are our honest picks, based on how people actually use them.
For yourself: 1x Wattoes
Pick Gray if you want a neutral look that hides wear, or Apricot for a lighter, cosier feel. Start on Low and keep Medium for desk days.
For two people: 2x Wattoes
Shared homes benefit from one pair each. Mixing Gray and Apricot makes it easy to tell them apart.
Best value: 3x Wattoes
Our best seller. It covers a small household or lets you gift a pair, and it includes free shipping at $44.36 per pair.
Family gifting: 4x Wattoes
At $35.97 per pair with free shipping, this is the lowest price per pair for gifting to adults.
Our verdict
Wattoes are a good fit if you are an adult who is often cold at home, wants cordless warmth and will follow the safety rules. They are not a good fit for sleeping, children, outdoor use or anyone with reduced foot sensation unless a doctor agrees. If that sounds like you, Medium on a desk day and Low on the sofa are the two settings you will use most.
What customers say
Comments from verified buyers who agreed to share them.
"I work from a cold spare room and Medium gets me through a full morning. The knit is soft and they look like normal slippers."
Sarah
M.Verified buyer
"Bought the 3-pack for me and my parents. Easy button, clear colour lights, and charging was simple."
James
R.Verified buyer
"Warm in a few minutes. I wish High lasted longer, but Low easily gets me through an evening."
Priya
K.Verified buyer
"Hand washed mine after removing the batteries and they came out fine. Grip on the kitchen tiles is good."
Daniel
T.Verified buyer
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Add to cartPrices in USD. Taxes and duties vary by country and may be added at checkout.
Shipping and delivery
We ship only to countries where our compliance and carrier checks are complete. Every order includes tracking by email, and orders leave our warehouse within 1 to 2 business days. Import duties and taxes depend on your country and are shown at checkout where possible. Batteries ship under UN 38.3 and carrier lithium rules.
| Country / region | Delivery | Duties / tax |
|---|---|---|
| United States | 3–6 business days | No duties on most orders |
| United Kingdom | 5–8 business days | UK VAT collected at checkout |
| European Union | 5–9 business days | VAT collected at checkout |
| Canada | 5–8 business days | GST/HST may apply |
| Australia | 7–12 business days | GST may apply |
Returns, warranty and statutory rights
You can return unused or lightly tested slippers within 30 days of delivery for a refund. Contact support with your order number and we will send a prepaid label where available. Wattoes carry a 12-month warranty against manufacturing faults, provided in addition to your statutory consumer rights, which are unaffected.
Stop using any product that appears damaged, swollen or unusually hot, and contact us straight away. We will replace faulty items or refund them.
Tracked delivery
30-day returns
12-month warranty
About Wattoes and how we write this guide
Wattoes is run by Wattoes Home Comfort LLC, a small team focused on practical home-comfort products. We make cordless heated slippers for people who feel the cold at home, and we publish this guide so you can compare products with honest information, not slogans.
Company details
Wattoes Home Comfort LLC, 2100
Market Street, Suite 400, Wilmington, DE 19801, USA.
EU and
UK Responsible Person: Wattoes Europe Ltd, 14 Harbour Road,
Dublin D02 XY45, Ireland.
Email support@wattoes.net · Phone
+1 (800) 555-0142.
Editorial standards
Every safety statement is linked to a source below. We make no medical claims, we do not use before-and-after images, and we update this page whenever specifications or rules change. Last reviewed: January 2026.
Frequently asked questions
How are Wattoes different from regular slippers?
They add a heating pad in each sole and a removable power bank, so they produce warmth rather than only retaining it.
How hot do they get and are they safe?
Measured sole surface temperatures are about 36 °C on Low, 40 °C on Medium and 45 °C on High. They are for awake, indoor, supervised use, and you should remove them if your feet feel too hot.
Who should not use them?
Children, anyone sleeping, and anyone with reduced sensation in the feet (for example diabetes or neuropathy) unless approved by a doctor.
Can I sleep in them?
No. Do not wear them while sleeping or napping.
How do I charge them and how long does it take?
Remove the power banks and charge them with the supplied 5 V USB-C charger. A full charge takes about 3 hours.
How long does the battery last on each setting?
About 2.5 hours on High, 4 hours on Medium and up to 6 hours on Low.
How do I wash them?
Remove the power banks, hand wash in cool water with mild detergent, rinse, press out water without wringing and air dry fully.
What size should I order?
Gray fits EU 39 to 44 and Apricot fits EU 34 to 39. At EU 39 choose either colour, and size up if you wear thick socks.
Are the batteries replaceable and how do I recycle them?
Yes, they are removable and replaceable. Recycle spent batteries at a battery collection point, not in household waste.
Can children use them?
No. Wattoes are not for use by children.
Can I wear them outdoors?
No. They are designed for indoor use only.
Do they come with a charger?
Yes. Every pair includes a USB-C charging cable and manual. Use only the supplied charger.
Where do you ship and how long does it take?
We ship to the United States, United Kingdom, European Union, Canada and Australia. Delivery takes about 3 to 12 business days depending on destination, with tracking on every order.
What is your return policy?
You can return unused or lightly tested slippers within 30 days of delivery for a refund. Your statutory rights are unaffected.
Cosy, cordless warmth for every step at home
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