Because the prosthetic foot makes a difference for your fitting success

With his Taleo prosthetic foot Martin sits on the shore of the lake and prepares his rod with a bait.

It’s so much more than a foot. It’s your foundation.

The prosthetic foot makes everything else possible. Whether you‘re an above or below knee amputee, the quality and performance of your whole prosthesis will be impacted by the quality and performance of the prosthetic foot.

With a wide range of Ottobock prosthetic feet you can be sure that together with your O&P Professional you will find the one prosthetic foot fitting to your personal needs. Whether it is a foot made out of carbon or it is a microprocessor controlled foot – our whole portfolio is based on the same idea: building a foundation. We take our responsibility seriously. When choosing a prosthetic foot from Ottobock, you can be sure that each one is designed with passion, in compliance with highest quality standards and always with your needs in mind.

This is what you can rely on

With the widest range of prosthetic feet at Ottobock you can be sure to find the one foot fitting to your personal needs.Whether it is a foot made out of carbon or it is a microprocessor controlled foot - our whole portfolio is based on the same idea: building a foundation. Find out about our different categories of feet.

A technician sits at his table and checks the technical functionality of the Meridium prosthetic foot.


For generations, Ottobock feet have helped define what’s possible with a lower limb prosthesis. With every step, our feet carry on the traditions of craftsmanship, invention and passion – that continue to set our products apart.

The Triton side flex prosthetic foot is shown on a machine in a test situation.


Every detail within a prosthetic foot can make a difference for your daily life. That’s why when designing a foot, we treat every detail like it’s the most important one. Built to the same exceptional standard, our feet start and end with your needs.

In the Patient Care Centre, Detlef takes a few steps in a walking bar under the supervision of his O&P Professional.


If you decide together with your O&P Professional for an Ottobock foot, you can trust that you have chosen a foot that has been meticulously designed, rigorously evaluated and preferred by amputees around the world.

Our portfolio and (your role in) the fitting process

Each user is different and each user has different individual habits, preferences and goals. To meet your individual requirements and those of other users, it is not purposeful to provide one prosthetic foot for everyone but to have different prosthetic feet for different user profiles. Our prosthetic feet cater to your individual needs – convince yourself.

Apart from giving you more insights into our prosthetic foot portfolio, we put together some useful information on selection criteria, prosthetic feet in general and FAQs for you. So that you can better understand how your O&P Professional chooses a prosthetic foot for you. The better informed you are, the better you can tell your O&P Professional what you really need and the more actively you can participate during your fitting. Be sure that your O&P Professional will always choose what’s best for you.

Our carbon feet

With his Terion K2 prosthetic foot, an elderly user on a walking aid and supported by his wife takes a short walk through the city centre.

Terion K2. Confidence in every step.

Designed for less active individuals who mainly navigate indoor environments and will utilize a walking aid for outdoor ambulation and place a high value on dependable support from their prosthetic foot.


With her Trias prosthetic foot Anita walks along the street with a friend.

Trias. Secure as expected.

Designed for moderately active individuals who navigate indoor and familiar outdoor environments and place a high value on consistent stability when walking.


After fishing, Martin walks up a grassy hill with his Taleo prosthetic foot together with his son.

Taleo. Ready for everyday life.

Designed for active individuals who navigate varied indoor and outdoor environments and place a high value on effortless walking and the ability to go wherever life takes them.


Brecklyn walks up a steep mountain with her Triton prosthetic foot.

Triton. Your will. Your way.

Designed for highly active individuals who navigate varied indoor and outdoor environments and place a high value on uncompromised response and control even when performing high impact activities.


Our mechatronic feet

With his Meridium prosthetic foot, Hans stands at a bush and picks berries.

Meridium. Explore new paths.

Designed for moderately active individuals who navigate various indoor and outdoor environments and place a high value on intuitive adaptation that replicates natural movement.


With his Empower prosthetic foot, Carsten goes down an incline step by step.

Empower. Restore your power.

Designed for highly active individuals who navigate various indoor and outdoor environments and place a high value on the ability to cover longer distances and walk at a higher walking speed.


Our sports feet

With his Runner running blade, Léon is about to get started.

Runner. Set the pace.

Designed for everyone who wants to use the same running blade that even elite athletes use.


With his Challenger prosthetic foot, Alex plays volleyball in the sand with three friends.

Challenger. Get in the game.

Designed for everyone who participates in recreational sports while performing agile and powerful movements.


General information on prosthetic feet

Two SACH prosthetic feet in frontal view.

The basics

Designing prosthetic foot systems is challenging. It’s very difficult to reproduce the complex workings of the human foot and ankle. Ideally the foot will be light because its weight is added to the rest of the prosthetic leg. If the foot is too heavy and the suspension of the prosthesis is not appropriate, the connection to the socket and your limb will be affected and also the overall function of the prosthesis.

A good prosthetic foot should also be strong, as it will be taking on large forces and torque as you walk and run. Feet must also be small enough to fit within a foot shell, a cosmetic covering for the prosthetic foot, and thus fit within a shoe. Being light, strong, and small, and yet functional and durable is the challenge.

Early designs for prosthetic feet were often a solid piece of wood. A similar design, the SACH (solid-ankle-cushioned-heel) is still in use because of its sturdy function It is especially useful for individuals with lower activity levels. A SACH foot typically has a rigid inner structure (wood or plastic) surrounded by a compressible foam cosmetic shell.

The Taleo Low Profile prosthetic foot next to the matching footshell in frontal view.

Today’s more sophisticated feet add more functions and are secured inside a cosmetic shell. Most people never see their prosthetic foot without this exterior shell. The cosmetic shell stretches around the prosthetic foot and serves two purposes:

  • It makes your prosthetic foot look like an anatomical foot.
  • It fits snuggly in your shoe.

What’s inside the shell can vary dramatically. Prosthetic feet are designed to meet the needs of your lifestyle and activity level. Here are some factors to consider.


The materials in a prosthetic foot differ by activity level. Wood, plastic and foam are usually found in feet designed for individuals who have low activity levels and require stability. Lightweight carbon fiber feet meet the functional needs of active individuals since they are built for shock absorption and energy efficiency.

With her Trias prosthetic foot, Anita sits on her couch, relaxed and reading.


A prosthetic foot has to feel good for you to meet your activity goals. Comfort allows you to be more active and the function of your prosthetic foot directly affects comfort.

Detlef is amputated on one side and does walking exercises in the gymnastics room together with his therapist Markus.


Prosthetic feet are designed to mimic a human foot at a specific activity level. For lower activity individuals, a prosthetic foot is designed to provide stability and balance. For those who are most active, a prosthetic foot must mimic the natural foot during the act of walking. It must act as a shock absorber as you strike your heel to the ground, adapt to uneven terrain, provide a smooth rollover from heel to toe, and provide a rigid lever for propelling forward when you finish your step (“toe-off”).

Carsten buys at the market and thanks to his Triton side flex prosthetic foot he can make a long lunge.

Multi-axial motion

Some prosthetic feet are designed to mimic the ankle which allows the foot to move in multiple planes. Multi-axial capability in a foot allows the foot to absorb varying terrain by moving in all directions. These motions are forward to back, side to side and rotation around the ankle. Multi-axial motion is needed to walk comfortably and confidently on uneven ground where your foot must adapt to whatever it encounters.

Energy storage

A carbon fiber foot is able to store and return energy while walking and literally gives you a spring in your step. The carbon fiber acts as a spring which compresses as you apply weight and then propels you forward as you roll off the toe of the foot when the energy is returned. Some prosthetic feet have one spring in the heel and a second spring in the forefoot: just what you need for walking at different speeds, running, climbing hills or descending stairs with a secure, confident stride. With carbon fiber, the longer the spring, the more energy it can store and the more responsive the foot will be.

How you and your O&P Professional select the right prosthetic foot for you

Please note: Choosing a prosthetic foot that best suits your personal requirements, needs and goals is a complex task. Your O&P Professional is an expert in this field. Thanks to his education, experience and biomechanical knowledge, he will choose the prosthetic foot that helps achieve the best possible fitting outcome for you individually. The information provided in this section only serve as a guidance. Please contact your O&P Professional if you have more detailed questions.

An anatomical illustration showing the different amputation heights in the leg.

Amputation Level

Your level of amputation will be one of the first things that needs to be looked at when chosing the components in a prosthesis. An above knee amputation requires a prosthetic knee joint and the type of knee joint will help to define the appropriate prosthetic foot. This is where your O&P Professional will assess the functions of the prosthetic knee joint and recommend an appropriate prosthetic foot. Because the natural knee joint is intact after a below knee amputation, your O&P Professional will consider factors like length of the residual limb, strength and range of motion when recommending an appropriate prosthetic foot.

Kerstin is doing strenghtening exercises together with her two female friends in a sports room.

Activity Level

Manufacturers categorize prosthetic feet by the user’s activity level – also called mobility grade. This means that not every prosthetic foot can be used by every user. Selecting a prosthesis that matches your activity level will maximize your mobility and your quality of life. Here are some very basic indications for identifying your activity level. If you are on the border between two activity levels, your O&P Professional will consider multiple products to assess the one that is best for you.

Activity Level 1

The amputee has the ability or the potential to use the prosthesis for transfers or for the purpose of moving slowly on level floors. The amount of time and the distance the amputee can walk are seriously limited due to his or her condition.

Therapy goal:

Restoring the ability to stand and to walk indoors to a limited degree.

Activity Level 2

The amputee has the ability or the potential to walk slowly with the prosthesis and to negotiate low environmental obstacles like curbs, single steps or uneven surfaces. The amount of time and the distance the amputee can walk are seriously limited due to his or her condition.

Therapy goal:

Restoring the ability to stand and walk both indoors and outdoors.

Activity Level 3

The amputee has the ability or the potential to walk with the prosthesis at a medium to high speed as well as at different speeds and simultaneously overcome most natural obstacles. He or she is also capable of walking outdoors and engaging in professional, therapeutic and other activities that do not subject the prosthesis to above-average mechanical strain. There may be an increased need for safety due to secondary circumstances (additional disability, special living conditions) combined with medium to high mobility demands. The amount of time and the distance the patient can walk are only mildly restricted compared to individuals without disabilities.

Therapy goal:

Restoring the ability to stand and to walk indoors and outdoors with only mild restrictions.

Activity Level 4

The amputee's ability or potential to walk with a prosthesis is similar to that of the unrestricted outdoor walker. The amount of time and walking distance are not limited. Moreover, due to the high functional demands, a high degree of shock, tension and distortion can occur.

Therapy goal:

Restoring the ability to stand, walk and move about both indoors and outdoors without any limitations.

Body weight

Prosthetic feet are designed for a specific weight range. To ensure that a prosthetic foot performs well for you, your O&P professional will choose one suited to your weight class.

You can see Marije from behind with her Triton side flex prosthetic foot, which stands on the side of the curb.

Build height

Prosthetic feet vary in height. We call the height of a prosthetic foot build height. Your height and the length of your residual limb as a below knee amputee will determine the space you have for a prosthetic foot and what is the appropriate build height for the prosthetic foot. As an above knee amputee, the length of the prosthetic knee joint will be an additional factor to consider for the build height of the prosthetic foot.

Foot size

Like human feet, prosthetic feet differ in length/size. Prosthetic feet are sized by cm rather than standard shoe sizes. Every foot is available in a specific range of sizes. There are prosthetic feet that come in sizes for children while others are even sized for large adults. Ottobock running blades and specialty sports feet often have a a single size.

A bilateral amputated user is talking to his O&P Professional.

Personal factors

Apart from all the technical selection criteria, your O&P Professional will keep in mind your personal needs, living situation and goals when choosing a prosthetic foot for you. These factors might be the desire to participate in sports activities or the ability to paint your toenails. These are of great importance because your prosthetic foot should feel like an extension of yourself.

Frequently asked questions

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