Piro Flex: The 3D Printed SMO Everybody Loves

Piro Flex is the new gold standard for children with low-tone pronation. It's the least obtrusive SMO — incredibly flexible, yet delivering the support and fit your child needs.

Therapists trust it. Orthotists prefer it. And kids? They are too busy having fun to notice they are even wearing them.

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Engineered for Real Life

Six innovations that change how SMOs feel, fit, and perform.

Flexible TPU Material

TPU material combined with revolutionary design provides all-around compression while allowing natural movement. Supportive where it matters. Flexible where it counts.

Proprioceptive Soft Heel

A flexible zone built into the heel stabilizer. Delivering sensory feedback without sacrificing heel stability. Helping children improve body awareness with every step.

Integrated Dorsal Wrap

Wraps the foot for consistent compression and improved comfort. Say goodbye to loosing dorsal pads and chips forever!

Bio-Responsive Structure

Variable-thickness 3D printed design with soft edges and adaptive flexible areas prevents pressure points and need for adjustments — without adding bulk.

Low-Profile Design

A design unlike any other — setting a new standard: Unique slim chafes, targeted padding and thin profile to fit seamlessly in children's shoes. No special footwear required.

Smart Strap System

1-strap, 2-straps or Y-strap. No matter the option, there is no velcro weld to reduce breaking and allow a more precise fit.

Also available in a toe-walking version, stronger version and with forefoot posting.

Case Study

Steve & Simon: Twins. Severe Pronation. Finally, a Solution.

Steve and Simon are identical twin boys, age 4, diagnosed with developmental delay, hypotonia, severe pronation. Treatment history includes orthopedic shoes, foot orthoses and traditional SMOs with no satisfactory results. Their mom — a pediatric PT — hadn't found anything that provided correction, comfort and function. Until now!

Improved alignment Increased stability Enhanced function Greater comfort Reduced skin irritation

Made from measurements alone. Mom was thrilled.

100% Custom Fit

Built for One Child. Yours.

No Library Models

Every Piro Flex is designed and 3D printed from scratch for each individual child. 100% custom. No shortcuts. No compromises.

By Measurements or Scan

Seamless process based on scan of a cast or 10 measurements. Fast digital workflow with real-time data validation and design preview.

Perfect Fit, Every Time

Scan with sub-mm accuracy or utilize measurements with our proprietary software that turns them into an incredibly accurate digital model to ensure seamless fit. Precision and consistency that is unmatched.

Make It Personal.

Choose shell color, strap color, and add a personal symbol. Because an orthosis kids are proud of is an orthosis they'll actually wear.

Trusted by Orthotists

More than 1000 leading orthotic clinics and children's hospitals choose Piro.

“
"Quickly becoming the gold standard."

The calcaneal control is so intimate it's incredible. They fit amazingly well, super low profile, little to no adjustments at delivery. Patients, parents and physical therapists love them.

TD
Tyler DeLeo
Goal Pediatric Orthotics
“
"Clinically, I was very impressed."

Family was very happy with Piro fit and function, they work so much better for footwear. We had improved hindfoot control compared to competing SMOs. The malleoli modifications fit perfectly. I will definitely be recommending the Piro's due to the amount of control and how low profile they are in comparison.

AS
Alisha Simons
Hanger
“
"Compliance is up and adjustments are down."

Since using Piro devices, compliance is up and adjustments are down. These 3D printed multi-density devices have made an incredible difference in patient comfort as compared to traditionally fabricated orthoses. They are also more streamlined, making shoe selection easier.

ER
Eric Rzepa
Mary Free Bed

Common Questions

  • Excessive low-tone pronation
  • Triplanar instability
  • Developmental delay
  • Mild toe walking
  • Poor coordination
  • Proprioceptive deficits
The Piro Flex SMO is a custom orthotic device and is covered under the same insurance codes as other custom SMOs.
The Piro Flex SMO is designed for daily wear by active children. It's flexible but tough. The TPU material is resistant to damage and the intentional design means fewer parts to break or lose.
Piro is the world's #1 most utilized 3D-printed AFO and SMO. Over the past five years, it has helped tens of thousands of children in over 40 countries experience greater comfort and improved function.
The Piro Flex SMO design in general requires fewer adjustments due to bio-responsive design, durable straps and custom fit based on accurate model. However if adjustments are required, the device can be modified by grinding and thermoforming as any other SMOs.
Options include toe-walking configuration, various strap types, forefoot posting, full-length footplate, stronger version and personalized colors and symbols. Your orthotist can specify modifications when ordering.
Piro Flex is designed for a large range of sizes — from the smallest children up to those weighing 75 lbs. or with a foot length of 8". For larger children, we offer the 2-material Piro Fusion SMO which provides more support for bigger kids while still being low profile.
Find a certified Piro provider near you by choosing the Find a Clinic option below. There is already more than 1000 locations that provide Piro. If you do not see one near you, ask your orthotist to get in touch with us and we will provide them with necessary free training and tools.

For Parents

Start your journey toward a better SMO. Find a certified Piro provider near you.

Find a Clinic

For Orthotists

Start offering the best selling 3D printed pediatric SMO. Integrate our seamless digital workflow into your practice.

Offer Piro Orthoses

For Physical Therapists

Free accredited online training. Explore clinical studies on dynamic stability and flexible SMO technology. Earn CE credits.

Access Online Courses