Ossur Dynamic Carbon Fiber AFO Brace w/ Flex Foot | Drop Foot Brace

Ossur AFO Dynamic Carbon Fiber Drop Foot Brace with Flex-Foot Technology

The AFO Dynamic Drop Foot Brace utilizes Flex-Foot technology and the energy-storing properties of carbon fiber to provide a strong, lightweight solution for people with varying degrees of drop foot. This advanced ankle-foot orthosis delivers real energy return for a more efficient walk, making it ideal for active individuals leading busy lives.

How to Measure for Proper Fit

Primary Measurement (Required): Measure the circumference of your calf at its widest point. Use a flexible tape measure and wrap it around your calf muscle. This measurement determines your size (Small, Medium, Large, X-Large).

Additional Measurements for Optimal Fit

These measurements help ensure the AFO will fit your leg length and foot size properly:

• Leg Length: Measure from the bottom of your heel to the bend of your knee (popliteal crease) while standing
• Ankle Circumference: Measure around your ankle at the narrowest point
• Foot Length: Measure from heel to longest toe
• Shoe Size: Your regular shoe size (you may need shoes 1-2 sizes larger to accommodate the AFO, or you will have to have it custom cut to fit)

AFO Dynamic Selection Chart

	X-Small	Small	Medium	Large
Part numbers
Right Leg	O-102011	O-102012	O-102014	O-102016
Left Leg	O-102021	O-102022	O-102024	O-102026
Shoe size (US)
Male	3–5	5.5–7.5	8–10.5	11–14
Female	4–6.5	7–9	9.5–12	—
Foot size	8–9" (21–23 cm)	9–10" (23–25 cm)	10–10.75" (25–27 cm)	11–11.5" (27–29 cm)
Foot plate	8.75" (22 cm)	9.5" (24 cm)	10.25" (26 cm)	11" (28 cm)
Calf height*	12–13.5" (30–34 cm)	12.5–14.25" (32–36 cm)	13.25–15" (34–38 cm)	14.25–15.75" (36–40 cm)
Strap height**	12.6" (32 cm)	13.25" (34 cm)	14.25" (36 cm)	15" (38 cm)
Heel height	0.4" (1 cm)	0.6" (1.5 cm)	0.6" (1.5 cm)	0.6" (1.5 cm)
Weight	2.7 oz (75 g)	3.5 oz (100 g)	4.2 oz (120 g)	5 oz (140 g)

* Height measured at the thickest part of the calf.

** Strap height measured to the top strap position.

Product Overview Video

Clinical Indications

Drop foot secondary to:

• Cerebrovascular Accident (CVA/Stroke)
• Multiple Sclerosis (MS)
• Charcot-Marie-Tooth Disease (HMSN)
• Mild knee instability
• Other neurological conditions affecting dorsiflexion

Contraindications

• Severe ankle-foot deformities
• Fluctuating edema (significant daily swelling changes)
• Severe spasticity

Features & Benefits

• Flex-Foot Technology: Incorporates proven carbon fiber technology from Ossur's prosthetic division
• Energy Return: Carbon fiber stores and releases energy during gait for more efficient walking
• Lightweight & Strong: Carbon fiber is 5x stronger than steel yet extremely lightweight
• Tapered Carbon Heel: Stores energy and manages forces at heel strike
• Full-Length Toe Lever: Provides complete support during stance phase and reduces shock to opposite limb
• Medial-Lateral Stability: Creates stability at mid-stance for confident walking
• Reduces Energy Consumption: Minimizes hip hike and compensatory movements
• Discreet Design: Medial strut placement makes it less visible in shoes
• Open Anterior Shell: Superior anatomical fit with reduced heat and perspiration
• Weight Capacity: Supports up to 265 lbs (120 kg)

What's Included

The AFO Dynamic comes complete with one carbon fiber AFO brace, foam padding, and adjustable straps.

 

Application Instructions

Follow these step-by-step instructions for proper application of your AFO Dynamic brace:

 

Frequently Asked Questions

How do I trim the AFO if it's too large?

You will need to take it to a Prosthetic and Orthotic clinic. They can custom-cut the carbon fiber to fit properly and address any issues such as rubbing or pressure points. Professional trimming ensures the structural integrity of the carbon fiber is maintained.

What is Foot Drop?

Foot drop (sometimes called drop foot) is difficulty lifting the front part of the foot. The most common cause is injury to the peroneal nerve, which controls the muscles that lift your foot. If you have foot drop, the front of your foot might drag on the ground when you walk. Foot drop is not a disease itself—it's a sign of an underlying neurological, muscular, or anatomical problem. Sometimes foot drop is temporary, but it can be permanent.

What are the symptoms of Foot Drop?

Foot drop makes it difficult to lift the front part of your foot, so it might drag on the floor when you walk. This can cause you to raise your thigh higher than normal when walking (steppage gait) to help your foot clear the floor. This unusual gait might cause you to slap your foot down onto the floor with each step. In some cases, the skin on the top of your foot and toes feels numb. Depending on the cause, foot drop can affect one or both feet.

What causes Foot Drop?

Foot drop is caused by weakness or paralysis of the muscles involved in lifting the front part of the foot. Common causes include:

• Nerve injury: Compression of the peroneal nerve in your leg (most common cause). This nerve can be injured during hip or knee replacement surgery. A "pinched nerve" in the spine can also cause foot drop. People with diabetes are more susceptible to nerve disorders associated with foot drop.
• Muscle or nerve disorders: Muscular dystrophy, polio, or Charcot-Marie-Tooth disease can contribute to foot drop.
• Brain and spinal cord disorders: ALS, multiple sclerosis, or stroke may cause foot drop.

What shoes work best with the AFO Dynamic?

You'll need lace-up shoes or boots that are 1-2 sizes larger than your normal shoe size to accommodate the AFO. Athletic shoes with removable insoles work well. Avoid slip-ons, loafers, and shoes with narrow toe boxes. See our complete shoe guide for detailed recommendations.

When should I replace the straps and padding?

With daily use, soft goods (straps, padding, Velcro) typically need replacement about once a year, sometimes sooner if you're very active or wash them frequently. Signs it's time to replace: Velcro no longer sticks well, padding is compressed or thin, straps are frayed, or the brace feels loose even when fully tightened.

Warranty & Authenticity

Authorized Dealer | 6-Month Manufacturer Warranty | Authentic Product Quality Guaranteed

OrthoTape.com is an authorized dealer of Ossur products and guarantees their authenticity and craftsmanship. Unlike eBay and Amazon which may sell counterfeit or outdated items, we get our products directly from the manufacturer as an authorized dealer. We also back our products with great customer service. You always have someone you can call!

Questions? Call us: 800-580-9887 (M-F 9:30 AM – 5 PM EST)