The modular shoe · Patent pending GB2610123.8 · UK
Built to let go.
Step on the heel. The sole stays outside. You go in. The first footwear standard made in two parts, for people who take their shoes off ten times a day.
Hold the shoe to step on the heel · or hold spaceTouch and hold the shoe to step on the heel
The problem
of British adults take their shoes off at the door. Nobody built the shoe for it.
- 10–15×
- a day, bending down to take shoes off and put them back on.
- 4–6 mo
- between pairs for a child under six, because feet grow and shoes don't.
- 200 yrs
- since the lace-up was designed, for people who kept their shoes on all day.
Footwear never evolved for shoe-removal cultures. Britain is one.
YouGov, 2022 · Start-Rite · ONS
The click · on record
Step on the heel. The sole stays outside. You go in.
- 01Approach.Walk to the door as normal. Nothing to undo.
- 02Step on the heel.The connector releases. No hands, no bending.
- 03Walk in.The sole stays outside with the street. The upper comes in clean.
- 04Step back in.It clicks. You're gone.
1,000+ attach and detach cycles on the bench. Still boring. That's the point.
Two parts · one connector
Two parts and one click. That is the whole invention.
- 01 · UpperKnit sock-boot.
Swappable and wipeable. Any upper clicks onto the same sole. Colour, material and season change; the platform doesn't.
- 02 · ConnectorHands-free release.
Step on the heel to let go, step in to lock. 1,000+ cycles validated on the bench.
- 03 · SoleTwo moulded parts.
Simple to tool, simple to make. Five adjustable sizes instead of fifteen.
Patent pending GB2610123.8, filed 30 April 2026.
Two moulded parts and one connector. The upper is a knit sock-boot; the sole is the standard. Everything Koofs makes next stands on this click.
The platform
One sole. Any upper.
SoleOne standard
Swap the upper, keep the sole.
- Worn upper? Replace it.
- Growing child? Adjust.
- New look? Swap.
Five sizes cover the range of fifteen. Foldable uppers pack flat, about three times the density of a boxed shoe.
Adjustable · 2027
The child grows. The shoe adjusts.
One sole covers three fixed sizes. Drag to see the sole extend at the midfoot; the Unit's foot bar moves the same distance.
Every generation stands on the same sole
- 2026BasicDetachable sole. V1 connector, 1,000+ cycles.
- 2027KidsAdjustable sizing. Fewer replacements.
- 2028TravelFoldable, swappable. Premium uppers.
- 2029Upper coversA new look without a new upper.
- 2030+Sensor soleWearables, on the same standard.
Origin
Wudu in January, without the hallway floor.
We built it for this first. Koofs is built by Muslims, for shoe-removal cultures, and made precise enough that anyone adopts it. Five times a day, the sole stays outside and the floor stays clean.
- 3.87M
- Muslims in England and Wales, up 44% in a decade. 2021 census.
- 69%
- of British adults already take their shoes off at the door. Shoes off is the default.
Who takes their shoes off all day
Five groups. One shoe.
| Segment | The moment | UK | World |
|---|---|---|---|
| Muslim households | Wudu at work, mosque, home. Five times a day. | 4M | 2.0B |
| Children and parents | Growing feet, school run, nursery floor. | 12.6M | 2.0B |
| Travellers | Airports, hotels, other people's homes. | 94.6M trips/yr | 1.5B trips/yr |
| Tradespeople | On site, off site, in and out of the van. | 2M+ | 250M+ |
| Homemakers and carers | Indoor, outdoor, back again, all day. | 1.7M+ | 748M+ |
| ONS, DfT, industry estimates | 6.5B+ people in shoe-removal cultures | ||
Made in two parts
Made in two parts so it lasts twice as long.
- −67%
- Sizes to stockFive adjustable sizes replace fifteen fixed ones.
- −67%
- MouldsOne standard sole. New uppers launch without retooling.
- −60%
- MaterialOne sole, many uppers. Replace the part that wore, not the pair.
- ~3×
- Denser to shipFoldable uppers pack flat. Standard soles make take-back possible later.
Every part has a number, a cost and a route. Sourcing runs through Accio Work on Alibaba.com.
On record
Built, tested, iterated. Now beta.
- Prototype 1Mechanism builtSole release designed and tested.
- Prototype 2Materials and weightIterated for convenience and cost.
- NowProduction-ready directionLow-volume tooling in preparation.
- Next20 beta unitsTwo-week wear test, on record.
- 1,000+
- attach and detach cycles validated.
- 50+
- customer conversations, UK, online and in person.
- 9 / 10
- pain resonance with Muslim customers.
- 8 / 10
- would pay £35 to £55.
First run
Reserve a pair.
1,500 pairs. UK first. £45 on Kickstarter, £55 at retail. No payment now. We write once, when the run opens.
Reserved. You're on the first run.
UK first · 1,500 pairs · we write once
Company
Two brothers and a problem we live every day.
Sultan Mustapha
CEO · product designer · engineer
Engineering background, seven years of product design across several industries. Hardware and tech start-up experience. Lived experience: prayer, ablution, the hallway floor.
Abdul-Hameed Mustapha
CFO · operations
Finance and operations lead. Supply, cost and cash discipline for a hardware business. Same house, same doors, same problem.
Proven UK retail relationships. Manufacturing and design-for-manufacture experience at volume. Equity on the table. The conversation starts with an email.
Press, retail and partners: koofsofficial@gmail.com
Press kit on request · @koofsofficial · LinkedIn