Vari-flex With Evo

Vari-flex With Evo

by Ossur

For 25 years, Flex-Foot® has been the foot of choice for prosthetists and amputees alike and with the new Vari-Flex with EVO, the evolution continues.

The Vari-Flex with EVO provides a unique combination of comfort and dynamics, and is designed to make life easier – for everyone.

For prosthetists, the Vari-Flex with EVO is lightweight, easy to assemble and its slender profile makes it easy to cover cosmetically. And for amputees it ensures the highest levels of confidence and security. Offering natural gait with less fatigue and ultimately less strain on the lower back and sound side, it is the ideal foot for any activity.

Vari-Flex with EVO enables amputees to walk more comfortably, better and for longer.Ideal for most activity, Vari-Flex with EVO replicates the functions of the human foot beautifully. Its extra smooth roll-over motion contributes to a more natural, symmetrical gait, which means less fatigue and ultimately less strain on the lower back and sound side of the body.


  • Vertical forces generated at heel contact are stored and translated into a linear motion described as Active Tibial Progression. This action reduces the need to actively push the body forward using the contralateral foot and also equalizes stride length.

  • The Carbon-X Active Heel stores the energy during loading response as the amputee transfers his or her body weight onto the prosthetic foot. Energy is gradually released from the heel providing optimal return for forward progression of the limb.

  • The EVO (Energy Vector Optimization) feature is generated by controlling how the ground reaction force is transferred to the prosthetic foot. Each step is optimized through the magnitude, placement and direction of forces for maximum efficiency. EVO enables the amputee to develop the most natural gait progression possible which reduces fatigue and puts less pressure on the sound side.

  • The full length keel/toe lever matches the length of the sound foot, providing improved support to the prosthetic limb during late stance. It ensures that users spend equal time on the prosthetic foot and natural limb, thus providing improved walking dynamics and reduced impact to the sound limb.

  • The layering of carbon fibre, optimised through extensive computer analysis and mechanical testing, ensures that the deflection of the carbon fibre heel and forefoot components are proportional to the user’s weight and impact level.

  • A split toe feature allows the foot to adjust to uneven surfaces, allowing amputees to walk with stability and comfort on uneven ground.

Product Details:

22, 23, 24, 25, 26, 27, 28, 29, 30
Product Weight
25 oz
Weight Limit
365 lbs
Activity Level
Mounting Type
Energy Storing Energy Return

Additional information:

Trial Period
36 months
L Code
L5980, L5986
Sandal Toe

For more information visit

360 product photography created with Arqball Spin technology visit for details.

Don't have access?
Call for your free login credentials.
All fields are required.

forgot password?

Please check your email for your authorization code.