IAMBIC engineers precision-fit footwear built to the millimeter through advanced smartphone scanning, AI, and biomechanics. Designed in New York City and crafted in Portugal, your foundation begins with the MODEL T.
Recognized as a TIME Best Invention and backed by the U.S. National Science Foundation.
You can feel the difference in the first few steps, but the best fit starts before you take a step.
The MODEL T is built on structure, a steady platform, a full lacing system, and premium leather that gets better with wear. Those benefits show up best when the shoe is put on the right way, every time.
Footwear researchers consistently find that comfort is a real, measurable outcome, and fit, fixation, materials, and how the shoe interacts with the foot over time are the biggest drivers of comfort (Menz & Bonanno, 2021).
Below are the founder-approved habits that protect the structure of the shoe and help you lock into your intended fit.
5 Tips from the IAMBIC Founders
1. Unlace fully
Open the laces completely before putting your shoes on or taking them off.
Why it matters: a structured shoe is designed to hold its shape. Fully unlacing allows a clean entry so the upper and heel stay upright, reducing unnecessary stress on the collar and internal structure. Footwear care and construction guidance consistently recommends unlacing rather than forcing entry to preserve shape and fit over time (Repetto, n.d.).
Reminder: if you have to “force” entry, loosen one more set of eyelets.
2. Guide your foot in
Slide your foot in gently, keeping the heel collar upright. A shoehorn is a smart tool here, especially in the first few wears.
Why it matters: the heel counter stabilizes the rearfoot. Repeatedly stepping on the heel to get into a shoe can deform this structure, and once deformed, it does not fully recover. Shoe care guidance across performance and dress footwear highlights heel counter damage as a common cause of reduced fit quality and heel discomfort (FootJoy, n.d.).
Reminder: think “glide,” not “push.”
3. Seat the heel before you lace
Before you touch the laces, press your heel firmly down and back into place.
Why it matters: proper fit starts at the heel and carries forward. Seating the heel first ensures your foot is positioned consistently on the platform before the upper is secured. Footwear comfort emphasizes that comfort emerges from how securely the foot is held and how well the shoe interfaces with individual anatomy rather than from any single material or feature (Menz & Bonanno, 2021).
Reminder: stand up, tap your heel gently once, then lace.
4. Lock in the fit with the full lacing system
Tighten the laces until your foot feels anchored, snug, stable, and supported, without any need to grip with your toes.
Why it matters: lacing directly affects how much the foot moves inside the shoe. In a controlled laboratory study, looser lacing was associated with increased in-shoe foot displacement and heel movement compared to properly secured lacing (Fiedler et al., 2011).
A broader review of footwear construction also identifies fixation systems, including lacing, as key contributors to stability, comfort, and overall shoe performance (Orr et al., 2022).
Reminder: aim for “held,” not “compressed.” If you feel pressure hotspots on top of the foot, re-lace with even tension rather than pulling hard in one section.
5. Let the leather evolve
Full-grain leather is a collagen-fiber network with viscoelastic behavior, which is a technical way of saying it responds to repeated flexing and use by becoming more supple.
Why it matters: Leather is a layered collagen fiber network and it shows time-dependent, viscoelastic behavior under load, including creep, which helps explain why it can feel more supple with repeated wear (Li et al., 2009).
Reminder: your first few wears are about consistency. Lace the same way, seat the heel the same way, and let the material adapt gradually.
The simple routine that gets it right in 20 seconds
- Unlace fully.
- Keep the heel collar upright, guide your foot in.
- Seat the heel all the way back.
- Lace evenly, then finish with a firm, secure tie.
- Take five steps, then micro-adjust tension if needed.
FAQs
Do I really need to unlace fully every time?
Yes. Fully unlacing protects the collar and internal structure by allowing a clean entry and exit, so the shoe keeps its shape and fit over time.
Should I use a shoehorn?
A shoehorn is a smart tool, especially in the first few wears. It helps you guide your foot in while keeping the heel collar upright.
How do I know the laces are tight enough?
Your foot should feel anchored, snug, stable, and supported, without any need to grip with your toes. Aim for “held,” not “compressed.” If you feel pressure hotspots on top of the foot, re-lace with even tension rather than pulling hard in one section.
How long does it take for the leather to break in?
The first few wears are about consistency. Lace the same way, seat the heel the same way, and let the material adapt gradually.
Helpful links
IAMBIC is not a medical device and does not diagnose or treat medical conditions.
The most interesting thing about them being crafted just for me is how well they fit. And I had never even noticed that my shoes didn't fit right. My other shoes don't hurt me - they just slosh around. With these, the heels actually stay on the whole time and it fits snugly yet still comfortably. 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 walk down the street, get on the subway, do my commute, bring my kids to school, and not feel concerned 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 that I had been feeling with the shoes that I previously came in wearing were completely gone. I was wearing 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.
I deal with chronic foot pain, and a lot of it comes from shoes that do not really fit. When I wear my IAMBICs, I notice less pain and they are incredibly comfortable. I do not worry about support, and I even get compliments on them when I am out, which feels great.
A lot of shoes feel fine for a short walk but not for hours. What I like about IAMBIC is that it feels snug and comfortable, yet substantial enough for long walks without discomfort. That matters to me, and the shoe has really delivered on that.
The first time I tried my IAMBICs, I noticed the difference right away. I have small feet, so most shoes either do not fit or are uncomfortable somewhere. Knowing these were tailored to my foot was meaningful. They are truly comfortable and still versatile in style, which is rare to find.
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.
In motorsport, a millimeter matters. My IAMBICs are built with that same precision, and you can feel it when you move. They remind me of the exactness you find in high-performance machines, translated into footwear.
With IAMBIC, I can be on my feet through long shoots without that usual end-of-day fatigue. I do not worry about burning out or feeling drained like I used to. They help me get through overtime and long days without thinking about pain.
They move with me and quickly became part of my day. I do not wear them only for style, I wear them because they make me feel good. The comfort and support are what keep me reaching for them.
With most shoes I am always wishing I had chosen something else. With IAMBIC, I don’t think about switching. I want everything else to feel the way these do, because they are the pair I reach for every day.
When I wear my IAMBICs, I barely notice them, and I think that says everything. The difference shows up when I switch to other high-end sneakers and immediately feel the discomfort. They fit my feet so well that comfort just feels natural.