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Run Insoles
Run Insoles
Next-Generation Support for Every Stride.
Regular price
$ 85.00
Regular price
Sale price
$ 85.00
Unit price
per
A new era of performance starts underfoot.
The all-new Run Insole is built from the ground up with nitrogen-infused supercritical foam that propels every stride forward — our lightest, most responsive design yet. A precision heel plug absorbs shock on impact, while a reengineered arch and top cover evenly distribute weight for smoother transitions and lasting comfort. The result: less fatigue, more power, and the first step in Tread Labs’ next-generation insole line.
90-day Returns
HSA/FSA Eligible
Guarantee
Guarantee
If it’s not everything you hoped for, we’ll make it right. Every Run Insole comes with a 30-day fit guarantee and our Million Mile Guarantee — lifetime coverage on the arch supports and replaceable top covers to keep them fresh.
Specs
Specs
- Medical-Grade Polypropylene Arch Support – Recyclable, ultra-durable shell with anti-squeak hex tread. Available in four arch heights.
- Nitrogen-Infused Supercritical Foam – Elite-level midsole technology, engineered into an insole for the first time. Lightweight, high-rebound energy return that fuels every stride.
- Calcaneal Drop Zone – Heel cutout reduces pressure and improves cushioning at impact.
- PU Heel Pad (6mm) – Extra shock absorption for long runs and heavy landings.
- PURE® Top Cover – Low-friction, antimicrobial fabric keeps feet cooler, drier, and fresher.
- True Fit Architecture – 11 cover sizes (Men’s 4–14 | Women’s 5–15) for a locked-in, no-slip fit.
- Thickness – 5mm forefoot to match standard running shoe insoles.
Shipping
Shipping
We offer free shipping within the US. Transit time is 4-5 business days.
Shipping to Canada is $10 with a transit time of 5-7 business days.
International shipping costs $15. All duties, taxes and fees are paid by the customer.
We ship Monday-Friday, excluding holidays.
Sandals Sizing
Sandal Measurements
Measurements apply to all sandal styles.
Imperial
Metric
Printable Fitting Guides
"Try on" our sandals at home with printable guides to ensure a great fit.
- Click on your shoe size below (size up if you're a half size).
- Print the PDF at 100% scale or "actual size."
- Compare it with your foot to confirm your size.
Sandals don't fit perfectly? Return new-condition, unaltered sandals within 30 days.
What's My Arch Height?
Finding your arch height is as easy as looking at your wet footprint. See how it's done.
| Is your footprint between arch heights? Start with the lower arch and see how it feels. Free exchanges make it risk-free to try them out. |
| What Does Your Wet Footprint Look Like? | Describe Your Arch | Your Best Tread Labs Insole Height |
|---|---|---|
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My arch is flat when I stand or sit. | Low |
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My arch is flat when I stand but appears when I sit. | Medium |
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My arch is close to but doesn't touch the ground. | Medium |
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My arch is high off the ground when I stand. | High |
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My mid-foot barely touches the ground, if at all. Sometimes, my footprint is two pieces. |
Extra high |
Wet Foot Test
Quickly and easily find your arch height with this simple test.
What Do High Arches Mean?
People with high arches can often experience foot pain because of the extra stress high arches put on your metatarsal bones. The stress ends up shifting your weight to the ball of your foot.
With high arches, underpronation (also called supination) is common. This can put too much pressure on the joints and muscles of the foot, ankle, and leg.
What Are The Best Insoles for High Arches?
People with high arches need insoles that offer full support across the entire arch so as to eliminate excessive pressure on the ball and heel of the foot. The arch support of the insole should mimic the height of the arch of your foot and the insoles should be firm and durable so they keep their shape during use and over time.
What Do Flat Feet Mean?
Many people with flat feet don't experience any difficulties, but some suffer from pain in the heel or arch (plantar fasciitis), swelling along the inside of the ankles, and knee and hip problems.People with flat can experience overpronation, which is when the foot rolls too far inward before you push off to move forward. When this inward rolling motion goes too far, the alignment of the foot is compromised and there is a loss of efficiency in every step you take. Negative effects of overpronation include arch collapse, plantar fasciitis, inefficiency and pain in your feet, knees, hips and back.
Rigid vs. Flexible Flat Feet
If your wet footprint indicates you have flat feet or low arches, you'll need to determine if you have rigid flat feet or flexible flat feet because it will change the arch height your feet need for maximum comfort and support. To figure out which type of flat feet you have:
- Sit with one leg over the opposite knee. Look at where your arch should be. If your foot looks more arched than your wet test footprint, you have flexible feet. This means your low arches are brought on by weight-bearing and a medium arch insole will work best for you.
- Stand on tip toes. Have a friend look at where your arch should be. Like the example above, if your arches show themselves, your feet are flexible.
- If an arch doesn't appear in either of the tests, you have rigid, low arches and should choose an insole with a low arch. A higher arch support will probably be very uncomfortable on your arch and feel like you have a golf ball in your shoe.
People with flat feet often ask if they should get insoles for high or extra high arches to try and "fix" their flat feet. While low arches aren't anything that need to be fixed, they do still need to be properly supported.
Using a high or extra high arch on low arches could cause discomfort, and the feeling like something is digging into your arch. A low or medium arch (depending on the flexibility of your foot) is the best place to start.
What Are The Best Insoles For Flat Feet?
The best insoles for flat feet support your arch and stabilize your heel, preventing overpronation. Typically, the best insoles for flat feet will offer a low, but supportive arch. Finding one that matches the contours of your foot is key.
While soft, cushioned insoles might seem like the best choice, what your feet really need is structural support. All of Tread Labs semi-custom insoles come in four arch heights to accommodate arch heights from low to extra high.
What Makes Run Insoles Better
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One size does not fit all.
Run insoles come in four arch heights – low, medium, high, or extra high – so you can get the perfect fit for your feet.
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Like new, on demand.
Tread Labs insoles are made with a 2-part system: an arch support and a replaceable top cover. Easily replace the top cover to make your insoles like new again.
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Guaranteed to last.
Our molded arch supports are built to last a million miles. If they ever break or lose their shape, we'll send you a new pair. No questions asked.
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Built on breakthrough foam.
Nitrogen-infused supercritical foam delivers high-rebound cushioning that outlasts ordinary materials — comfort that keeps performing.
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Together, They Rip.
Shoes protect. The Run Insole powers. Together, they deliver stride-correcting alignment, explosive energy return, and comfort that doesn’t quit. Less wasted motion. Less fatigue. More speed, more endurance, more PRs. This is running unlocked.
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The Fix Your Shoes Missed.
Running shoes come and go. The Run Insole stays. Built with recyclable polypropylene, nitrogen-infused supercritical foam, and our Million Mile Guarantee, it’s the upgrade that stays with you run after run, changing how you train, race, and recover. One upgrade. Infinite miles.
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Master Your Stride. Or Get Left.
Every stride starts with your foundation. The Run Insole stabilizes your arch, reduces joint stress, and improves running mechanics. Stronger form means more efficiency, fewer injuries, and faster recovery. Better form. Stronger runs. Fewer setbacks.
Fit It. Forget It. Fly.
No two runners are the same and neither are their arches. With four arch heights and 11 size options, the Run Insole dials in a custom fit your shoes can’t. The result: more stability, less slippage, and a stride that feels built just for you.
Engineered Where It Matters Most.
Impact begins at the heel — so we rebuilt it. The Run Insole’s precision heel plug absorbs shock, improves alignment, and helps you stay powerful through every stride. It’s a small detail with big results.
Stronger Stride. Fewer Setbacks.
Every misaligned step steals energy and increases risk. The Run Insole stabilizes from the ground up: aligning joints, improving form, and protecting against the injuries that cut training short. Run longer. Finish faster. Recover Stronger.