The clinical fitting process practitioners use, at your door. Trial all three EVA arch support levels at home, then receive your matching Model P+ orthotic made from NeuroFlex
The Modular is used to determine your preferred level of support
Trial three arch inserts (Low · Moderate · High) — after the trial, it becomes your spare pair
Then Model P+ ships free in your chosen support level
Optional full length padded top cover included
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Try risk-free — 90-day full refund guarantee. Free shipping over $60.
Not sure about fit? Here's how it works.
Your Model P+ arrives with the Modular: three arch inserts in Low, Moderate and High support.
Start on Low. Step up to Moderate, then High, only if you need more support.
Once you've found your preferred arch height, reply to the email we send you, and we'll send your orthotic in that arch height.
It's all included in your $135, with no extra cost.
Not sure of your arch? Model P+ is the right place to start. Choose your size with our size chart.
| MEN | WOMEN | |||
|---|---|---|---|---|
| AUS/US | UK | INTERPOD | AUS/US | UK |
| 4-5 | 3-4 | Small | 5-6 | 3-4 |
| 6-7 | 5-6 | Medium | 7-8 | 5-6 |
| 8-9 | 7-8 | Large | 9-10 | 7-8 |
| 10-11 | 9-10 | XLarge | 11-12 | 9-10 |
| 12-13 | 11-12 | 2XLarge | 13-14 | 11-12 |
Foot pain isn't about arch shape. It's about motion.The level of support your foot needs depends on how much resistance to supination your foot has — a measurable biomechanical property. Practitioners measure it in clinic. Model P+ lets you find it the same way: by trial.
Flat or high-arched feet — the problem is the same. So is the solution.
DAY-ONE RELIEF
Your Modular isn't just a measurement tool — with the same four design features as the range, it relieves your symptoms from the day it arrives.
YOUR ORTHOTIC INCLUDED
Once you've settled on your support level, your matching NeuroFlex orthotic ships free.
THE CLINICAL METHOD
The same low-to-high prescription protocol practitioners use in clinic. At home.
Every practitioner follows the same rule: prescribe the minimum support that resolves symptoms — comfortably. Model P+ gives you the same protocol at home. Your Modular is the EVA trial you keep; trial its three inserts, 3–5 days each, to fine-tune the level of support and comfort that's right for you — escalating only if your pain doesn't resolve.
3-5 DAYS
Click the Green insert into your EVA base. Wear in your normal shoes for 3–5 days. The lowest arch is the most comfortable, fits the most shoe types, and is the practitioner's first choice.
↓ if pain persists
3–5 days
Click out the Green. Click in the Orange. Trial again for 3–5 days. Moderate support — the level of support most patients find adequate
↓ if pain persists
3–5 days
Maximum support. Click out the Orange, click in the Red. Trial for 3–5 days. Most patients find their fit at Green or Orange — Red is the final escalation step.
↓ if pain still doesn't resolve
REFUND OR REFERRAL
If maximum support hasn't resolved your symptoms, the cause may not be biomechanical — or may need clinical assessment. A small percentage of cases need more than an orthotic can offer alone.
Whichever insert works for you, your matching NeuroFlex orthotic ships free. Both orthotics are yours to keep — the EVA Modular orthotic can be used in other shoes.
Two clinical principles guide the order. Together, they explain why every practitioner prescribes the minimum support needed — and why Model P+ follows the same protocol.
Model P+ isn't one product — it's a two-stage system. Your Modular is the EVA trial you keep; you use it to fine-tune your support and comfort, then your matching Model P+ ships in that level — free. It's how you reach a personalised result at a fraction of a custom orthotic's price.
Your Modular: one navy EVA base + three interchangeable arch inserts (Green Low Support / Orange Moderate Support / Red High Support. It isn't just a measurement tool — it carries the same four design features as the rest of the Interpod range. It's the EVA trial that finds your level; your shank-independent NeuroFlex orthotic is the one you keep.
When you've found your preferred level of support and comfort your Model P+ orthotic ships with the same level of support. Slimmer, lighter, more flexible and shank-independent — the arch bridges between heel and forefoot and springs under your weight instead of flattening into the shoe, so your support holds in any shoe. Engineered to last. 5-year warranty.
Made from the same NeuroFlex material used in Model P — in your chosen support level. The clinical fitting process practitioners use, in your own hands.
🟢 Green → Low Support
🟠 Orange → Moderate Support
🔴 Red → High Support
Model P+ uses the same four design features as the range — two measured on Interpod at university, two used in custom work. Interpod devices are tested in 8 independent studies across 4 universities and 3 countries over 27 years.
27 years in the clinic, prescribing patients with orthotics
"No measurable difference between podiatrist-prescribed custom-made orthotics and Interpod."
La Trobe, Duquesne, Plymouth and Southampton University's
★ 4.5 out of 5
Each insert and the EVA base carry the same biomechanical features as Australia's leading clinical orthotics. These aren't features added to an insole — they ARE the difference between an insole and a real orthotic.
Pain relief across a wide range of foot, leg, and lower back conditions — by reducing the strain that causes them.
Upgrade to a Personalised Fit
$135
Pain Relief
$85
Once you place your order, you'll receive an email containing a link to our Confirm Support Level submission form. You'll also find a QR code and direct link included with your Model P+ when it arrives. Once you've trialled all three support levels, simply complete the form to let us know which level felt best for you and we will ship that one to you.
You can also access the Confirm Support Level submission form here
Yes. The Model P+ is designed to be worn like a regular orthotic throughout your trial.
It uses the same four core design features, arch profile and university-backed design principles as the rest of the Interpod range, so your feet are supported from the moment you start wearing it.
During the trial, you adjust the support level to find what feels right for you while continuing to wear the orthotic in your everyday shoes. Once you’ve identified your preferred support level, your matching NeuroFlex orthotic is sent to you as the pair you keep.
Your Model P+ — one pair of EVA bases + three pairs of interchangeable arch inserts in Green (Low 4°), Orange (Moderate 6°), and Red (High 8°). Plus the fitting guide and shipping satchel for your free orthotic. All three inserts are yours to keep regardless of which one you choose.
Model P is the moderate-support orthotic — built for the level most people need . Model P+ includes the Modular that helps you find your support first, then ships your matching NeuroFlex orthotic free. If Moderate suits you, you'll end up with the same orange-banded NeuroFlex Model P inside Model P+ ($135) — confirmed by trial. If you need Low or High instead, Model P+ is how you find out.
3–5 days per insert. If your pain has clearly improved by then, that's your fit — stay with that insert. If the pain hasn't improved, step up to the next height. The process usually completes in 1–3 weeks depending on which insert works for you.
Your NeuroFlex orthotic ships with the full-length Thin cover— light padding for easy fit, a slim profile that suits dress shoes, work shoes, and everyday footwear without compromising fit. It's removable and self-adhesive, so you can replace it at any time without replacing the NeuroFlex shell.
Choose the lower one. Two clinical reasons: (1) lower arches are more comfortable across more shoe types, and (2) prescribing the minimum support needed is the standard practitioner approach. If your symptoms return later, you can always step up — your inserts stay with you.
A small percentage of cases need more than an orthotic can offer alone — the cause may not be biomechanical, or may need clinical assessment. If maximum support hasn't worked after 3–5 days, see a Podiatrist or contact us— your Model P+ is covered by a 90-day refund guarantee.
5 years on the shell. NeuroFlex is engineered for permanence — unlike EVA, which compresses over time, NeuroFlex maintains its biomechanical properties for years of daily wear. The orthotic comes with a 5-year warranty. Top covers wear faster (12–18 months under daily wear) and can be replaced without replacing the shell.
EVA is the right material for the Modular — it's softer, more forgiving, and lets your foot adjust quickly to each support level. NeuroFlex is the right material for permanence— slimmer, lighter, structurally stable, and fatigue-resistant for years. Each material is engineered for its job in the system.
The clinical fitting process practitioners use — at home, on your terms, in your own shoes. $135 includes everything: the Modular, all three arch inserts, your matching NeuroFlex orthotic in your chosen cover.
