The most important clinical decision with Custom Orthotic Materials Eva Polypropylene Carbon Fiber isn't which treatment to start with — it's which subtype or underlying cause you actually have. Our podiatrists regularly see patients who've been treated for months for the wrong diagnosis. The correct identification changes the entire treatment path. Call (810) 206-1402 — Dr. Tom evaluates this condition at both Howell and Bloomfield Township locations.
Custom orthotic materials — EVA, polypropylene, carbon fiber — each have specific properties for different conditions. The wrong material for your foot type can create new problems while solving none.
You’re in the right place. Dr. Tom Biernacki, DPM, FACFAS — board-certified foot & ankle surgeon with 3,000+ surgeries — explains exactly what custom orthotic materials means and what works. Call (810) 206-1402 to book at Howell or Bloomfield Township.
Medically reviewed by Dr. Tom Biernacki, DPM · Board-Certified Podiatric Surgeon · Last reviewed: April 2026 · Editorial Policy
Quick Answer
Medically reviewed by Dr. Tom Biernacki, DPM
Board-certified podiatric surgeon | Balance Foot & Ankle
Last reviewed: May 2026
Custom Orthotic Materials Guide: EVA vs Polypropylene vs Car relates to orthotic fitting — typically caused by biomechanical foot needs. Most patients improve in 2 weeks to break in with conservative care. Appointments in Howell + Bloomfield Township: (810) 206-1402.
Medically reviewed by Dr. Tom Biernacki, DPM — Board-certified foot & ankle surgeon, 3,000+ surgeries performed. Updated April 2026 with current clinical evidence. This article reflects real practice experience from Balance Foot & Ankle Specialists in Howell and Bloomfield Township, Michigan.
Quick Answer
Custom orthotics are prescription inserts made from a 3D scan of your foot. They address the structural cause of plantar fasciitis, flat feet, or metatarsalgia rather than just cushioning symptoms. Most patients feel improvement within 2-4 weeks. Covered by most PPO plans and Medicare when medically indicated.
Watch: Dr. Tom Biernacki, DPM
Medically reviewed by Dr. Tom Biernacki, DPM — Board-Certified Podiatric Surgeon — Balance Foot & Ankle, Howell & Bloomfield Township, MI. Last updated April 2026.
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Medically Reviewed by Dr. Tom Biernacki, DPM — Board-Certified Podiatrist, Balance Foot & Ankle Specialists, Michigan. Last updated April 2026.
Custom foot orthotics are not a single product — they are prescription medical devices fabricated from a range of materials that have fundamentally different mechanical properties and clinical applications. Selecting the appropriate shell material, top cover, and posting is as important as the orthotic design itself. Understanding the characteristics of the three primary shell materials helps explain why the same patient population may receive different materials for different activity applications.
EVA (Ethylene-Vinyl Acetate)
EVA is a closed-cell foam available in a range of densities (durometers), from very soft accommodative foams to firm corrective grades. It is the most commonly used material for accommodative orthotics — those designed to redistribute pressure and cushion rather than to produce biomechanical correction. EVA excels in diabetic foot orthotics, where total contact pressure distribution and protection of insensate skin is the primary goal; in pediatric orthotics for growing feet; and for patients with inflammatory arthritis who need cushioning around painful joints. EVA compresses over time — higher-density EVA maintains its corrective properties longer than soft foam grades, but all EVA orthotics require periodic replacement (typically 12–18 months with regular use). EVA has limited torsional rigidity, making it less effective for conditions requiring precise hindfoot control.
Polypropylene
Polypropylene is the classic functional orthotic material — a rigid thermoplastic shell that provides durable biomechanical control of hindfoot and midfoot motion. It is the workhorse material for plantar fasciitis, posterior tibial tendon dysfunction, mild-moderate flatfoot correction, and most functional orthotic applications in ambulatory adults. Polypropylene provides consistent correction over years of use without significant compression set, and it accommodates diverse top covers (from thin vinyl for dress shoes to thick accommodative foam for athletic applications). It is less appropriate for patients with severe plantar pressure abnormalities requiring total contact accommodation, inflammatory joint disease with pain response to rigid forces, or activities requiring significant shock absorption (ultra-marathon running, high-impact sports).
Carbon Fiber
Carbon fiber composite orthotics offer the highest stiffness-to-weight ratio of any orthotic shell material — producing maximal rigidity at minimal device thickness and weight. This makes carbon fiber the material of choice for athletic applications where performance is paramount, for patients with severe deformity requiring maximum control, and for applications where a full-length rigid foot plate is needed (hallux rigidus Morton’s extension, Lisfranc injury management, midfoot arthritis stiffening). Carbon fiber is also valuable for patients who need rigid foot control in dress or tight-fitting shoes where polypropylene thickness is prohibitive. The primary limitation is cost (significantly higher than polypropylene) and brittleness — carbon fiber devices require proper shoe fit to avoid edge loading and stress fracture of the device. Dr. Biernacki at Balance Foot & Ankle fabricates custom orthotics using 3D digital foot scanning and selects materials based on individual biomechanical needs and activity requirements. Call (810) 206-1402 for a custom orthotic evaluation at our Bloomfield Township or Howell office.
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Our board-certified podiatrists treat this condition at two convenient locations. Book online 24/7 at either office.
When to See a Podiatrist
Many foot conditions can be managed conservatively at home, but some require professional evaluation. See a podiatrist promptly if you experience:
- Pain that persists for more than 2 weeks despite rest
- Swelling, redness, or warmth that isn’t improving
- Numbness, tingling, or burning in the feet
- A wound or sore that is not healing within 2 weeks
- Any foot concern if you have diabetes or poor circulation
- Nail changes that suggest fungal infection or other problems
At Balance Foot & Ankle, our three board-certified podiatrists — Dr. Tom Biernacki, Dr. Carl Jay, and Dr. Daria Gutkin — provide comprehensive foot and ankle care at our Howell and Bloomfield Township offices. Most insurance plans are accepted.
Related Conditions & Resources
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Board-certified podiatrists Dr. Tom Biernacki, Dr. Carl Jay, and Dr. Daria Gutkin see patients daily at our Howell and Bloomfield Township, MI offices.
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Howell Office
4330 E Grand River Ave
Howell, MI 48843
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Bloomfield Township Office
43494 Woodward Ave, #208
Bloomfield Township, MI 48302
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Book online 24/7 at either office.
In-Office Treatment at Balance Foot & Ankle
If home care isn’t resolving your your foot or ankle concern, a visit with a board-certified podiatrist is the fastest path to accurate diagnosis and a personalized plan. At Balance Foot & Ankle Specialists, Dr. Tom Biernacki, Dr. Carl Jay, and Dr. Daria Gutkin offer appointments at both our Howell and Bloomfield Township offices. We perform on-site diagnostic ultrasound, digital X-ray, conservative care, advanced regenerative treatments, and minimally invasive surgery when indicated.
Call (810) 206-1402 or request an appointment online. Most insurance plans accepted, including Medicare, Blue Cross Blue Shield, Aetna, Cigna, and United Healthcare.
In Our Clinic
The patients we see for custom orthotic consultations usually fall into two groups. First are athletes — runners, hikers, basketball players — looking to correct a biomechanical asymmetry they’ve identified themselves or their coach has flagged. Second are middle-aged patients with chronic plantar fasciitis, metatarsalgia, or early arthritis who have exhausted over-the-counter inserts. Our process begins with a 3D foot scan plus a gait-video analysis on our in-office treadmill. We select materials based on activity — a stiffer carbon composite for performance running, a softer plastazote top cover for diabetic patients, a semi-rigid polypropylene for everyday wear. Most patients adapt in 2–4 weeks.
Most Common Mistake We See
The most common mistake we see is: Wearing new orthotics all day from day one. Fix: break-in schedule of 2 hours on day one, adding 2 hours per day until full-day tolerance.
Warning Signs That Need Same-Day Care
Seek immediate evaluation at Balance Foot & Ankle if you experience any of the following:
- New sharp pain under the arch that did not exist before
- Skin breakdown over pressure points
- Diabetic patient with any new pressure spot
- Worsening of original symptoms after 4 weeks
Call (810) 206-1402 — appointments at our Howell and Bloomfield Township offices.
Watch: Dr. Tom explains
Podiatrist-recommended products
As an Amazon Associate, Dr. Tom earns from qualifying purchases.
Dual-layer EVA/polypropylene hybrid — try before custom.
Add-on accommodations used with rigid polypropylene shells.
Relief during orthotic break-in period.
Comfort while adapting to custom orthotics.
Related resources
Ready to solve this? Book today.
Book online 24/7 · Howell & Bloomfield Township · 4.9★ (1,200+ reviews)
More Podiatrist-Recommended Orthotics Essentials
PowerStep Pinnacle
Watch: Best Insoles & Orthotics 2026 [Flat Feet, Plantar Fasciitis, Bunions] — MichiganFootDoctors YouTube
The podiatrist-recommended OTC orthotic — arch support + heel cup.
CURREX RunPro Insole
Performance insole for runners — reduces fatigue and prevents injuries.
Tuli’s Heel Cups
Shock-absorbing heel cushion — adds lift and relief under painful heels.
As an Amazon Associate, Balance Foot & Ankle earns from qualifying purchases. Product recommendations are based on clinical experience; prices and availability shown above update live from Amazon.
When to See a Podiatrist
Off-the-shelf inserts help 70% of patients — but if you’ve tried several without relief, custom orthotics molded to your specific foot mechanics are usually the next step. Balance Foot & Ankle makes custom orthotics in-office and most major insurance plans cover them. We’ll cast or scan your feet and have them ready in about 2 weeks.
Call Balance Foot & Ankle: (810) 206-1402 · Book online · Offices in Howell & Bloomfield Township
Pros & Cons of Conservative Care for orthotics
Advantages
- ✓ Custom orthotics 80%+ improvement
- ✓ Most insurance covers
- ✓ Lasts 3-5 years
Considerations
- ✗ 2-week break-in
- ✗ Custom can be $400-700
- ✗ OTC limits effectiveness
Dr. Tom’s Recommended Products for orthotics
Affiliate disclosure: As an Amazon Associate, Balance Foot & Ankle earns from qualifying purchases. We only recommend products we use with patients.
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Appointments in Howell + Bloomfield Township. Most insurance accepted. Dr. Tom Biernacki, DPM & team.
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Appointments available in Howell and Bloomfield Township, Michigan.
Ready to Get Relief?
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Dr. Tom Biernacki, DPM is a board-certified foot & ankle surgeon (ABFAS & ABPM) at Balance Foot & Ankle Specialists in Southeast Michigan. With over a decade of clinical experience, he specializes in heel pain, bunions, diabetic foot care, sports injuries, and minimally invasive surgery. Dr. Biernacki is a member of the APMA and ACFAS, and his patient education content on MichiganFootDoctors.com and YouTube has made him one of the most-followed foot & ankle educators on YouTube.