Every IAMBIC pair begins as data, captured through a 3D scan that maps more than twenty biometric variables per foot. The Fit Engine transforms that data into a digital last measured in millimeters, not sizes.
From there, European artisans cut full-grain Italian leather and assemble your pair with precision. The result is a balance of engineering and craft—footwear designed to move intelligently with you.
Named a TIME Best Invention, supported by the U.S. National Science Foundation. Designed in New York City. Crafted in Portugal.
Not ready to order? Take the Fit Guide Quiz to explore your precision fit.
Meet Keith C.
A seasoned tech entrepreneur and venture investor who has built companies at the intersection of technology and human performance. As founder of FitLinxx (#20 on the Deloitte Fast 500) and Great Play (three-time Entrepreneur 500 company), he pioneered innovations in fitness technology and motion analysis for children’s development.
Now, as Managing Director at Techstars in Washington DC and NYC, Keith guides the next generation of founders. He holds multiple patents in sensor and machine-vision technology, has raised over $50 million in venture funding, and earned degrees from Cornell and MIT.
Keith wears the MODEL T in white and black. We spoke with him about fit, comfort, and the moment heel slip stopped.
From heel slip to secure comfort
For Keith, comfort meant stability. His heels used to lift with each step in traditional dress shoes. After switching to a pair crafted to his exact fit, the slip stopped. Walking New York sidewalks felt lighter and more efficient without pressure points or friction.
Discover the MODEL T engineered for endurance and balance.
Why secure fit matters for executive performance
Feet are asymmetric and dynamic — changing with heat, travel, and workload. A precise fit supports alignment and reduces fatigue so your focus stays on the day ahead.
- Posture support: Alignment that lasts through long hours
- Lower fatigue: Reduced strain during meetings and travel
- Fewer hotspots: No heel slip or friction
- Consistency: Fit that improves with each pair through the Precision Fit Program
How personalization solves heel slip
Mass sizing relies on averages. Two people sharing a size can have entirely different heel shapes, arch heights, and instep volumes — the reason slip happens. IAMBIC eliminates that compromise.
Our Fit Engine combines three smartphone images with a comfort survey to model over 20 biometric variables. A biomechanical engineer reviews your fit plan before craft begins. Each pair is built from your geometry and refined through Sole Print™ analysis over time.
Prefer guidance on your first scan? Schedule a live consultation with an engineer. Learn more in IAMBIC 101 and How custom-fit shoes work.
Q&A with Keith
How did it feel wearing a true one-of-one pair crafted just for you?
The most interesting thing is how well they fit. I never realized my old shoes were off until these stayed snug and comfortable all day. Even after miles in New York, they still feel new.
How do you feel about the look and style of the shoes?
I was surprised by how refined they look. They work with jeans, jackets, or business casual. People notice them and ask about the story — which is fun to share.
What aspects of IAMBIC’s technology impressed you most?
The simplicity. Three photos and data build a fit that feels engineered for you. It makes you wonder why all shoes aren’t made this way.
What excites you about the Sole Print technology?
Knowing that future pairs learn from my wear is incredible. It means comfort can keep evolving — and I’ll never go back to off-the-rack fit.
How has precision fit changed your expectations for footwear?
Once you wear a pair that’s actually built to your foot, everything else feels generic. It’s how shoes should have always been made.
Explore the MODEL T and learn why it was named a TIME Best Invention.
Next step
Experience the fit that adapts to you. Take the Fit Guide Quiz or begin your custom pair.
FAQs
How does the process work for my first pair?
Step 1: Order your MODEL T.
Step 2: Complete a Virtual Consultation on your smartphone by taking three photos per foot and answering a short comfort profile.
Step 3: Your pair is crafted in Portugal and ships in about 4–6 weeks.
If you prefer to start with guidance, take the Fit Guide Quiz.
Can a biomechanical engineer guide my scan live?
Yes. You can schedule a video session for support and fit review.
What if my heels still slip?
Your fit plan includes preferences and adjustments. We stand behind the Signature Fit Guarantee with unlimited refits.
How do future pairs improve?
Each pair learns from your feedback and Sole Print wear photos to refine geometry and comfort through the Precision Fit Program.
The most interesting thing about them being crafted just for me is how well they fit. And I hadnever even noticed that my shoes didn't fit right. My other shoes don't hurt me - they just slosharound. With these, the heels actually stay on the whole time and it fits snugly yet stillcomfortably. And I'd never experienced that before. They just stay comfortable all day.
As a runner, as an athlete, just knowing that I'm doing a good service to my body is incredible.It’s the reason that I love my IAMBIC shoes. It's that precision that makes me feel safe to walkdown the street, get on the subway, do my commute, bring my kids to school, and not feelconcerned that I'm doing it in a shoe that doesn't fit right or that doesn't feel good.
The thing that I was surprised by the most with the precision fit is that any pressure points thatI had been feeling with the shoes that I previously came in wearing were completely gone. I waswearing a shoe that wasn't too tight. It wasn't too loose. The sole fit just right. Total comfort.That's the best way to put it.
So I suffer from chronic foot pain and I believe that a lot of that has to do with wearing shoesthat actually don't fit. Whenever I wear my IAMBICs, I've noticed that I have felt less pain,which is really incredible. And they're just so comfortable. I'm not worried about the back of my heel popping out or my ankles not having enough support. Also, they're just so stylish andevery timeI wear them out in the street, I always get compliments, which never happens to me.
A shoe that may feel comfortable for a half hour walk is not a shoe that always feels comfortablefor a three and a half hour walk. So what I like about IAMBIC is, even though the snug fit isthere and it feels comfortable, it also feels substantial enough that I can walk a lot withoutgetting any discomfort. That's just something that's especially important to me and I think theshoe has really delivered that.
The first moment that I tried on my IAMBIC shoes, I noticed a difference. I have small feet. So whenever I try on shoes, I usually expect them to not fit. If they do fit, there's usually some sort of discomfort, whether that's in the toe box or too much space or at the heel. So knowing that this shoe was tailored to my foot was really meaningful. It's rare that you find a shoe like IAMBIC that truly is comfortable, but also hits the markers of style versatility.
I think we're all placed on this earth as unique individuals. None of us are really off the rack in terms of sizing. So for me to have that experience of having something made specifically for me that fit perfectly was something that was a little bit mind blowing. And once I got the shoes, I tried them on, they looked great, they felt great. And honestly, they fit like a glove.