The prefabricated orthotic with custom orthotic features

Position the Keystone under the navicular and apply supination force. Record the reading in Newtons.

Low supination resistance → Low arch. Moderate → Moderate arch. High → High arch. The measurement determines the minimum effective level of support.

select the appropriate Interpod product and arch height. No casting, scanning, or lab turnaround required.

Laterally positioned axis. Lower pronation forces. Prescribe Low arch support. These patients typically do well with the Flex 4° or Soft Low arch.

Normal axis position. Moderate pronation forces. Prescribe Moderate arch support. Flex 6° or Soft Moderate arch is typically appropriate.

Medially deviated axis. High pronation forces. Prescribe High arch support. Flex 8° or Soft High arch provides the maximum correction. Consider if custom may still be indicated for very high readings.

Use the Keystone Device to measure supination resistance with the patient standing in relaxed stance. This measurement determines the minimum effective level of orthotic support needed.

Low resistance (<100N) → Low arch support (4° rearfoot wedge, low material stiffness). Moderate resistance (100–200N) → Moderate arch support (6° rearfoot wedge). High resistance (200+N) → High arch support (8° rearfoot wedge, consider high material stiffness).

High stiffness NeuroFlex™ is recommended for medially deviated subtalar joint axes and heavier patients where greater resistance to pronation is required.

Perform Jack's Test — dorsiflex the hallux and check 1st metatarsal and 1st ray motion. This determines whether forefoot additions are required to assist the windlass mechanism.

Design features to consider: Lateral Pads (to allow 1st met plantarflexion), Plantar Fascial Groove (reduces windlass initiation force), 1st Ray Cutaway (prevents orthotic blocking forefoot function), or increased rearfoot wedging.

Check dorsiflexion available at the ankle joint. If dorsiflexion is limited, use Heel Lifts (4mm or 6mm)to prevent the orthotic pushing into the patient's arch and creating discomfort. Heel lifts also reduce Achilles tension and compensate for limb length differences.

Choose the product range based on clinical indication, patient footwear, and material preference:

Flex Original (NeuroFlex™) — shank independent. ¾ shell with full cover. 4°/6°/8° rearfoot wedge. Single stiffness. Rearfoot Wedge, Cuboid Notch, Plantar Fascial Groove.

Flex New (NeuroFlex™) — shank independent. ¾ shell with full cover. 4°/6°/8° rearfoot wedge. Low & High stiffness. Improved Plantar Fascial Groove + 1st Ray Cutaway. Also available in 0° (no rearfoot wedge).

Soft (Polyurethane) — superior shock absorption. Full-length and ¾-length. Shank dependent. Available in 4°/6°/8° arch heights, or 0° with Low & High stiffness for cushioning without rearfoot correction.

Diabetic (Polyurethane + PORON 96) — pressure redistribution for the at-risk foot. Proven 20% more efficient at reducing forefoot pressure-time integral vs custom total contact insoles (NHS Plymouth).

Modular (EVA) — interchangeable arch inserts. Ideal when the practitioner wants the patient to trial multiple levels before committing, or for dispensing at point of care.

Select device size using the Interpod size chart. Fit the device in the patient's shoe, check for comfort, and assess rearfoot position with the device in situ. Confirm the heel sits centred in the heel cup and the arch contour matches the foot without excessive pressure. Sometimes the patient must be advised to wear a more supportive shoe to accommodate the orthotic — if the patient is unwilling to compromise, a slimmer device may be needed.

No lab turnaround. No casting. No scanning. Dispense same-day from your on-site stock.

Orthotics are effective in the short term because alternative treatment options — such as increasing tissue capacity through mechanobiology techniques like eccentric loading, or changing running form — take time. Orthotics bridge the gap by reducing tissue strain while these adaptations occur.

Long-term orthotic use may be necessary where the patient will not comply with exercises, where repetitive loads are too high for tissue adaptation, or where an individual's biomechanics produce high joint moments due to subtalar joint axis position. Excessive body weight can also be a contributing factor.

NeuroFlex™ — Shank Independent

The original clinical Flex device. ¾ shell with full cover. Available in 4°, 6°, and 8° rearfoot wedge. Single stiffness. Integral rearfoot posting over the subtalar joint axis eliminates pronation moments created by lateral heel cups.

NeuroFlex™ — Shank Independent — Low & High Stiffness

The updated Flex with improved Plantar Fascial Groove and the addition of 1st Ray Cutaway. ¾ shell with full cover. Available in 4°, 6°, and 8° rearfoot wedge. Low and High stiffness — use High stiffness for medially deviated subtalar joint axes and heavier patients where greater resistance to pronation is required.

NeuroFlex™ — Shank Independent — Low & High Stiffness

Arch support with heel cup but no rearfoot wedging. For patients who need arch contouring and biomechanical design features but where rearfoot posting is not indicated. Low and High stiffness options.

Polyurethane — Full Length & ¾ Length — Shank Dependent

Superior shock absorption with biomechanical support. Polyurethane base resists compression for consistent, long-lasting support. Available in three arch heights with rearfoot wedging.

Polyurethane — Full Length — Low & High Stiffness — Shank Dependent

Full-length cushioning with arch contouring but no rearfoot wedging. Available in Low and High stiffness. Use when shock absorption and comfort are the primary goals without rearfoot correction.

Polyurethane + PORON 96 Top Cover — Full Length

For the at-risk diabetic foot requiring biomechanical support. 6° rearfoot wedge provides moderate pronation control alongside PORON 96 pressure redistribution. NHS Plymouth research showed 20% greater efficiency at reducing forefoot pressure-time integral vs custom total contact insoles.

Polyurethane + PORON 96 Top Cover — Full Length — Low & High Stiffness

For the at-risk diabetic foot where pressure redistribution and cushioning are the primary goals without rearfoot wedging. 0° neutral platform with PORON 96 top cover. Available in Low and High stiffness to match patient weight and tissue vulnerability.

EVA Base + 3 Interchangeable Arch Inserts

The Modular system in a clinical setting. Dispense the EVA base with all three arch inserts. Patient trials each level progressively. Ideal for point-of-care dispensing or when the Keystone is unavailable.

Age-appropriate biomechanical support

Paediatric sizing with the same design features as the adult range. For developmental flat foot, Sever's disease, and growing-related lower limb pain. Available in Soft and Flex materials.

Digital Supination Resistance Measuring Device

Handheld clinical device that objectively measures the force required to supinate the foot in Newtons. Determines the minimum effective level of orthotic support. Validated by Université du Québec and Charles Sturt University.

Replacement Black Suede Top Cover

Full-length replacement top covers for all Flex range devices (except 0 Degree). Extends device life without replacing the shell.

Redistributes pressure from the metatarsal heads. Can be trimmed to form a Met Bar for Morton's Neuroma. Also used to create a Reverse Windlass effect for patients with clawed toes.

Elevates metatarsals 2–5, allowing the 1st metatarsal to plantarflex — increasing dorsiflexion for improved Windlass function.

For decreased ankle dorsiflexion (as determined by the Lunge Test), Achilles tension, or limb length differences. Can also be trimmed and orientated on the orthotic heel to increase rearfoot wedging.

Integral rearfoot inversion blended into midfoot arch support. Resists pronation and assists supination. Available in 4°, 6°, and 8° across the range. La Trobe University confirmed Interpod is the most effective prefabricated orthotic at controlling rearfoot position.

Assists supination during midstance to push-off transition by supporting the lateral column. Typically only found in custom orthoses. Enhances the foot's natural resupination mechanism.

Allows natural first ray plantarflexion during push-off. Prevents the orthotic from blocking forefoot function — a common limitation of rigid prefabricated devices. Critical for hallux valgus and forefoot pathology.he patient's arch and creating discomfort. Heel lifts also reduce Achilles tension and compensate for limb length differences.

Reduces the force required to establish the windlass mechanism (p <0.001 at all angles — La Trobe). Improves gait efficiency and reduces arch irritation. Unique to Interpod.

No difference in comfort and fit vs custom-made orthoses

Plantar fascial groove reduces windlass force (p <0.001)

All arch heights produce significant changes (p <0.0001)

Significant reduction in internal tibial rotation

+28% gait efficiency (PURITY Index)

Keystone reliability validated

Supination resistance and rearfoot wedging correlation

Craig Payne — 20 years of research leadership

5 universities, 4 countries