Save 23%

Flat Feet Insoles with Arch Support

Contoured insoles with a firm arch, a U-shaped heel cup and cushioned padding for everyday shoes. Printed cutting lines let you trim them to fit, in five EU and UK size ranges.

£39.99 £51.99 You save £12.00

Tax included.

Structured arch support that holds its shape
U-shaped heel cup for a stable, secure heel
Shock-absorbing cushioning and a breathable, soft fabric
Printed cutting lines to trim them to your shoes

In stock. Order today, shipment before 30/10/2026.

Tracked UK delivery

30-day money-back guarantee

Secure, encrypted checkout

Overview

These insoles add a supportive, contoured shape to your everyday shoes. A firm arch support sits under the middle of your foot, a U-shaped heel cup keeps your heel steady, and shock-absorbing cushioning softens each step.

They're designed for people with flatter feet or high arches who want more support underfoot, and for anyone who spends long hours walking or standing. The top fabric is breathable to help your feet stay fresh, and printed cutting lines let you trim them to the exact shape of your shoes.

Contoured arch support insoles for closed shoes
U-shaped heel cup for stability
Shock-absorbing cushioning and extra padding
Breathable, smooth top fabric
Trim-to-fit with printed size lines

Specifications

Type: Arch support insoles
Arch: Structured, non-collapsing support
Heel: U-shaped heel cup
Cushioning: Shock-absorbing, extra padding
Top layer: Breathable, soft fabric
Fit: Trim along printed cutting lines
Sizes: EU 36–38, 39–40, 41–43, 44–45, 46–47
Footwear: Most closed shoes

How to use

1
Take the existing insole out of your shoe, if it lifts out.
2
Lay it on top of your new insole, lining up the heels, and find the matching printed cutting line.
3
Trim along that line with sharp scissors. Cut a little at a time and test the fit as you go.
4
Slide the insole into your shoe, heel first, and press it flat so the arch sits under the middle of your foot.
5
Wear them for a few hours at first and build up over several days.

Size guide

Choose the range that includes your usual shoe size. Each insole has printed cutting lines so you can trim it to the exact size of your shoe.

Size range	EU	UK
1	36–38	3.5–5
2	39–40	6–6.5
3	41–43	7–9
4	44–45	9.5–10.5
5	46–47	11–12

How to measure: the easiest guide is the insole already in your shoe. Lay it over the new insole, heels together, and trim along the matching line. If you're between two ranges, choose the larger range and trim it down.

Safety & use

These are comfort insoles. They are not a medical device and aren't designed to treat or correct any foot condition.

Build up wear gradually over the first week, as a new arch shape can feel unfamiliar at first.
Stop using them if you feel pain, numbness or rubbing.
If you have diabetes, poor circulation, reduced feeling in your feet or a diagnosed foot condition, check with your GP or podiatrist first.
If you already use prescribed orthotics, ask your podiatrist before switching.

Delivery & returns

Every order is packed within 1–2 working days and sent with a tracking number, so you can follow it all the way to your door. Delivery is free on every UK order.

30-day money-back guarantee: if you're not happy with your order, contact us within 30 days of purchase and we'll arrange a refund. See our refund policy for details.

Free UK delivery on every order

Trim-to-fit arch support

30-day money back

Replies within 24 hours

Arch support

Support under the middle of your foot

Flat shoe insoles leave your arch with nothing underneath it. These insoles add a structured, contoured arch that gives the middle of your foot a supportive, lifted feel with each step.

They're designed with flatter feet in mind and also suit higher arches, so your whole foot feels more evenly supported.

Structured archA contoured shape that supports your arch.
Flatter feetDesigned for a supportive feel when your arch is low.
Higher archesFills the gap under a high arch.
Balanced stepHelps your foot feel more evenly supported.

5Size ranges, EU 36 to 47

UK 3.5–12Shoe sizes covered

U-shapedHeel cup for stability

Heel support

A steady heel with every step

A U-shaped heel cup cradles the back of your foot and helps keep your heel centred, so it doesn't slide around inside your shoe.

That steady base helps you feel more balanced and stable when you walk and stand.

Secure heel fitKeeps the back of your foot steady.
Centred heelHelps your heel sit in the right place.
Balanced feelA more stable base when standing.

Airy comfort

Fresh and dry, even on long days

The top fabric is breathable, so air can move under your foot and heat and moisture don't build up as much.

It's soft and smooth against your foot or sock, which makes them comfortable for long wear.

BreathableAllows natural airflow underfoot.
Less moistureHelps reduce heat and dampness.
Fresh feelComfortable for extended wear.

Add to bag

Easy customisation

Trim them to fit your shoes

Each insole has printed cutting lines for different sizes. Line it up with your shoe's original insole, find the right line and trim with scissors.

A clean cut gives you an accurate fit inside trainers, work shoes and everyday shoes.

Easy to cutTrims cleanly with ordinary scissors.
Printed guidesSize lines printed on the insole.
Accurate fitMatches the shape of your shoe.

Size guide

Choose your size range

Pick the range that includes your usual shoe size, then trim along the printed lines for an exact fit.

Size range	EU	UK
1	36–38	3.5–5
2	39–40	6–6.5
3	41–43	7–9
4	44–45	9.5–10.5
5	46–47	11–12

How to measure: use the insole that came in your shoe as a template. Lay it on top, heels together, and trim along the matching line. Between two ranges? Choose the larger one and trim it down.

Built to last

Cushioned, durable and non-collapsing

Shock-absorbing cushioning softens the impact of each step, and extra padding adds comfort underfoot.

The materials are elastic and wear-resistant, and the arch support is built not to collapse, so it keeps its supportive shape with regular use.

Shock absorptionSoftens the impact as you walk.
Hard-wearingElastic, wear-resistant materials.
Stable archA structure designed not to collapse.
Extra paddingMore cushioning for comfort.

Where to use them

For the shoes you wear most

They suit most closed shoes, from trainers to work shoes.

Trainers

Everyday trainers and walking shoes.

Work shoes

Long shifts standing or walking.

Walking holidays

City breaks and sightseeing on foot.

Everyday

School runs, shopping and errands.

How to use

Trim, slide in, walk

All you need is a pair of scissors.

1
Remove the old insoleTake out the insole that's in your shoe, if it lifts out.
2
Find your lineLay the old insole on top, heels together, and find the matching printed line.
3
Trim carefullyCut along the line a little at a time, checking the fit as you go.
4
Slide it inInsert heel first and press flat so the arch sits under your foot.
5
Build up wearWear them for a few hours at first and increase over several days.

Good to know: A new arch shape can feel unfamiliar at first. Build up gradually and stop if anything feels painful.

Is it right for you?

Who they're made for

Made for

People with flatter feet or high arches who want more support
Anyone who walks or stands for long periods
Closed shoes such as trainers and work shoes
EU sizes 36 to 47

Check with your GP or podiatrist first if

You have diabetes or reduced feeling in your feet
You have a diagnosed foot condition or ongoing heel pain
You already use prescribed orthotics
Your child needs insoles

Reviews

What customers say

Reviews from Kiss Proof customers, collected by Loox after delivery.

Try it for 30 days, risk-free

If it isn't right for you, let us know within 30 days of purchase and we'll take care of it.

Add to bag

FAQ

Questions, answered

Will these insoles fix flat feet?

No insole can permanently change the shape of your foot, and we don't claim these will. What they do is add a structured arch and a steady heel cup, so your foot feels more supported in your shoes. If you have pain or a diagnosed condition, please see your GP or a podiatrist.

Will they help with plantar fasciitis or heel pain?

These are comfort insoles, not a medical treatment, so we can't say they will help a particular condition. Many people like the cushioning and arch support for long days on their feet. For ongoing heel or foot pain, please speak to your GP or a podiatrist.

Can I use them in any shoes?

They're designed for most closed shoes, such as trainers, walking shoes and work shoes. If your shoes have a removable insole, take it out first to leave room. They aren't suited to open sandals or very slim heels.

How do I choose my size?

Choose the range that includes your usual shoe size: EU 36–38 (UK 3.5–5), 39–40 (UK 6–6.5), 41–43 (UK 7–9), 44–45 (UK 9.5–10.5) or 46–47 (UK 11–12). Then trim along the printed lines for an exact fit.

How do I trim them?

Lay your shoe's original insole on top, line up the heels and find the matching printed cutting line. Trim with sharp scissors a little at a time, checking the fit as you go. It's easier to take off more than to put it back.

Can I wear them all day?

Once you're used to them, yes. They're breathable and cushioned for long wear. For the first few days, wear them for a few hours at a time and build up gradually, as a new arch shape can take some getting used to.

Do they flatten over time?

The arch support is designed not to collapse, and the materials are elastic and wear-resistant, so they keep their shape with regular use. How long they last depends on how often you wear them and how much walking you do.

Will they make my shoes feel tight?

They add a little volume, especially at the arch. Removing your shoe's existing insole usually leaves enough room. If your shoes are already snug, try them in a pair with a little more space.

Can I move them between shoes?

Yes, if your shoes are a similar size and shape. Once trimmed, they'll fit best in shoes that match the size you cut them to.

How quickly will my order arrive?

Orders are prepared within 1 to 2 business days and shipped with a tracking number so you can follow your parcel. Full delivery and returns details are in the Delivery & returns tab.

Still have a question? Email support@kissproof.co.uk or call +44 20 3376 2450.

Better support in the shoes you already own

Arch support insoles.Now £39.99.

Add to my bag Free UK delivery · 30-day money-back guarantee · Buy 2, save 15%

Your bag 0