Duo Series: Modular orthoses that adapt to your child

Children change more often than their devices do. With traditional orthoses, you commit at fitting. And children spend months in a device that is no longer the best they could be in.

Piro Duo works differently: the Flex SMO stays, and the support around it changes as your child does — as often as needed.

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Built to keep pace as children grow, change and progress

One Flex SMO platform, joined by the proprietary Duo lock to an AFO, a toe-walking SMO or a reinforced SMO — comfortable with none of the bulk or extra strapping that usually come with it**.

Piro Duo Flex – Flex SMO with a removable reinforced SMO

Duo Flex

Combination of the Flex & Reinforced SMO. Flex SMO continues to evolve: offering even more options, more support, yet no bulk.

Piro Duo Flex TW – Flex SMO with a removable toe-walking SMO

Duo Flex TW

Combination of the Flex & Toe-walking SMO. An adaptable approach for treating toe-walking patients.

Piro Duo Launch – Flex SMO locked into an AFO

Duo Launch

The Flex SMO & semi-flexible or solid AFO in a low-profile combination. Especially effective for early childhood development.

2-piece variable SMO

Duo Flex

Duo Flex is a two-part device: the Flex SMO plus a removable reinforced SMO that adds support when you need it. Built for the child who's larger or more involved — where Flex alone may not be enough, and a Fusion SMO is more than the situation calls for.

Thin profile, multiple configurations give you the real-time ability to tune the SMO flexibility.

Convertible toe-walking SMO

Duo Flex TW

A category of its own. For the first time, a SMO that converts to a toe-walking version and back — as needed.

The Flex SMO, with a removable toe-walking SMO. Built for the child who sits between the two: a toe-walking SMO when necessary, a standard SMO when possible. A great option for sensory patients among others.

SMO & AFO combo

Duo Launch

The Flex SMO and an AFO — one device, two orthoses: many possible configurations to deliver the support required without the additional bulk and straps that usually come with it.

The Flex SMO provides children the support needed to work through transitional skills without restricting functional range of motion.

When additional stability is needed for independent stance or steps, the unique Duo lock secures the SMO into the AFO in a low-profile design. The AFO can be configured to be semi-flexible or solid.

Common Questions

Piro Duo is a custom orthotic device and is covered under the same insurance codes as other custom SMOs and AFOs.
Piro Duo 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.
Yes — adjustability is the point of Duo. The support around the Flex SMO can be changed at any time by swapping the reinforced SMO, the toe-walking SMO or the AFO, without remaking the device. Beyond that, the Piro Duo 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.
Piro Flex is designed for a large range of sizes — from the smallest children up to those weighing 85 lbs. or with a foot length of 8". With Duo Flex, the removable reinforced SMO extends that range for children who need more support 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

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For Orthotists

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For Physical Therapists

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

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