Run Faster. Farther.

Insoles custom designed for your feet

Scan Your Feet

Made to order

Medical-grade 3D printing & hand assembly for a bespoke fit.

Get Custom Insoles

Better Mechanics

FAST insoles are performance-enhancing.

Scan Your Feet Now
custom running insoles using just your iPhone/ipad (no extra hardware required)

How it works

  • Scan Your feet
    Use an iOS FaceID enabled device to scan your feet using our app.
  • Custom Fit
    We use AI and real-time expert review to design a custom insole for each of your unique feet.
  • 3D Print
    We immediately 3D print, assemble, and ship your insoles from our North American lab.
Click to Scan Feet
Dura-Swiss top cover

Our medical-grade top cover will outlast and outperform any off-the-shelf insole. Since each insole we produce is entirely unique in shape, our lab techs custom-trim each top cover individually—like handmade shoes from a cobbler. This results in a seamless edge finish, eliminating any gaps or potential for rubbing.

FASTec Filament

Custom 3d printed insole body using our proprietary FASTec filament. The lightest, most flexible, and highest energy return of any orthotic/insole structural material on the market.

Dynamic Hex Structure

We found, through countless hours of testing with a variety of support structures, that we couldn't beat the honeybees. It's the lightest, strongest, and most supportive pattern—perfect for running insoles.

With 3D printing, we're able to do things that mass-produced insoles could never dream of. Compared to EVA foam (the industry standard for custom orthotics dating back to the 1970s), our dynamic hex beats it in every category—weight, strength, and longevity—while also adaptively changing firmness in critical regions.

Dura-Swiss top cover

Our medical-grade top cover will outlast and outperform any off-the-shelf insole. Since each insole we produce is entirely unique in shape, our lab techs custom-trim each top cover individually—like handmade shoes from a cobbler. This results in a seamless edge finish, eliminating any gaps or potential for rubbing.

FASTec Filament

Custom 3d printed insole body using our proprietary FASTec filament. The lightest, most flexible, and highest energy return of any orthotic/insole structural material on the market.

Dynamic Hex Structure

We found, through countless hours of testing with a variety of support structures, that we couldn't beat the honeybees. It's the lightest, strongest, and most supportive pattern—perfect for running insoles.

With 3D printing, we're able to do things that mass-produced insoles could never dream of. Compared to EVA foam (the industry standard for custom orthotics dating back to the 1970s), our dynamic hex beats it in every category—weight, strength, and longevity—while also adaptively changing firmness in critical regions.

The Tech

Why Custom Running Insoles?

Years of pounding the pavement add serious stress to your feet, knees, hips, and legs. That high impact, over the course of thousands of miles, eventually takes its toll. If you're not landing in a balanced or neutral position, injuries will keep coming back and perpetually slow your progress. FAST Insoles give you the support to land correctly, significantly reducing the strain on your body.

Our custom insoles: relieve foot pain or even stop it altogether, treat plantar fasciitis, and give you the support you need to run for years to come.

Here's how:

3d Perfect Support

Using prefab insoles is like wearing someone else's prescription glasses—likely not helpful and often worse. We use a 3D scan of your foot to create insoles that match your exact shape down to the millimeter.

Fun fact: Your feet are siblings, not identical twins. That’s why we craft two unique insoles—one for each foot. Precise arch-to-arch contact ensures impact is evenly absorbed, reducing strain and improving alignment from the ground up.

Build Your Insoles
Scan from your home in 1 minute

Scan App

  • TrueDepth iPhone technology
    Prepare - download the app, find a place to sit, and take off your socks
  • 3d Scan
    Press the scan button and ensure that the FaceID camera captures the entire foot.
  • Upload
    Our scan outputs a true 3d file that is an exact replica of your foot.

Built by Doctors

Racing is in our DNA. With decades of experience in running-specific podiatry, we've designed a product based on real performance outcomes.

Dr. Jay Spector DPM Running Podiatrist and RRCA Certified Running Coach
your feedback matters

What runners are saying:

5/5

“Ever since I switched to these custom insoles, my recovery has sped up tremendously—now I’m clocking longer, faster runs without the usual nagging injuries.”

Adam Frater Fitness Pro
5/5

“These insoles have become a key part of my training. They reduce my injury risk and help me bounce back faster, so I can push my pace and distance with confidence.”

Zach Levet Customer
5/5

“These insoles give my feet the support they need. I recover faster and feel more protected against injuries, so I can run longer and hit faster times.”

Reade Seiff Customer
5/5

"Nothing has made a bigger impact on my performance and recovery than these custom insoles. They improve my foot mechanics, reduce strain, and help me stay injury-free so I can keep running for years to come.

Nils Arend Customer
5/5

"I feel more efficient with every stride, and I’ve shaved time off my races without changing my training. The extra support gives me confidence to push harder without worrying about fatigue or pain."

Erik Huberman Customer
5/5

"I never realized how much energy I was wasting with poor foot mechanics until I started using Fast Insoles.

Sieva Kozinsky Customer
5/5

"I’ve tried off-the-shelf insoles before, but nothing compares to the custom fit of these. They give me the exact support I need, and I can feel the difference in my stride efficiency and overall comfort on every run."

Josh Zad Customer
5/5

"Before using these custom insoles, I’d finish long runs with sore feet and aching joints. Now, I recover faster, feel less fatigue, and can handle higher mileage without breaking down. They’re an essential part of my training."

Josh Wand Customer

Frequently Asked Questions

From the time you successfully complete the scan, you should expect the insoles to arrive at your door within 1-2 weeks. We will provide tracking once they are ready to be shipped.
60 Day Money Back Guarantee. We stand by our custom insoles and want you to love them. That’s why we offer hassle-free returns and adjustments. Try them for 60 days—if you’re not completely satisfied, return them for a full refund. Plus, if the fit isn’t perfect, we provide free adjustments for up to 60 days to ensure maximum comfort and support.
Fast custom insoles are designed to last at least two years, often even longer. However, because our feet naturally change over time, most specialists recommend getting a remold after this period for optimal support. Additionally, the top cover material is a consumable component that will naturally wear down based on usage and care. Its lifespan varies from person to person, depending on factors like activity level, how much you sweat, and maintenance.
Every shoe fits differently, and so do your feet in each pair. We highly recommend getting custom insoles for every pair of shoes you wear for the best fit and performance. When your insoles arrive, you may need to trim them slightly to achieve the best fit across multiple shoes. This won’t affect their function and helps accommodate sizing variations between brands, as a size 10 can differ in length and shape from one brand to another.
Check out this video. If the top cover is slightly too long, you can easily trim it with scissors for a perfect fit. Watch our video for step-by-step instructions on how to cut your insoles correctly. Important: Be sure to remove your old shoe inserts before using your new custom orthotics.
Fast Scan requires an iPhone 11 or newer with TrueDepth camera, running the latest iOS. iPad devices are not currently supported.
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