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Item #: FS5=0_B

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Suggested HCPCS Coding: L5981

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World’s First Load-Activated Foot
The THRIVE prosthetic foot is the world’s first load-activated carbon fiber prosthetic foot designed to accommodate added weight when lifting or carrying heavy objects. THRIVE provides support for variable weight when it’s needed – resulting in a dynamic foot that feels the same regardless of load.


  • Dual-Keel Design: THRIVE utilizes a synergistic, dual-keel design incorporating a full-length primary keel and a secondary, load-activated keel. When an additional load (up to 30% of the user’s body weight) is sensed, THRIVE’s primary keel progressively comes into contact with the upper keel, providing incremental support. This ensures consistent performance, and ultimately greater confidence among users.
  • Self-Activating Response to Varied Loads: Users are free to carry on with their activities with confidence and without a second thought.
  • Advanced Shock Absorption: 11 mm of shock absorption increases comfort and residual limb health by managing forces that would otherwise be directed to the socket and knee joint.
  • Exceptional Ground Compliance: Split toe construction with +/-15 degrees of inversion and eversion creates multi-axial ground compliance to provide dynamic control and stability on irregular surfaces.
  • Outstanding Durability and Reliability: Strong, carbon fiber construction and a hardy wear surface between the dual keels make THRIVE ideal for demanding users.


Activity Level K3, K4
Maximum Body Weight 365 lbs (166 kg)
Sizes 22 cm - 31 cm
Sizes (Sandal Toe) 22 cm - 28 cm
Stiffness 1, 2, 3, 4, 5, 6, 7, 8, 9
Footshell Color Light, Medium, Dark
~ Min. Clearance Height (Size 26 cm) 157 mm (6 3/16")
Product Weight (w/ footshell) (Size 26 cm) 26.81 oz (760 g)


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Instructions for Use - FS5 Thrive

Instructions for Use: 647G1731 (EN, DE, FR, NL)

Publish date: Mar 2, 2021

PDF Document (647G1731-all_INT-01-2102w.pdf | 476 KB)

FS5 Thrive Spec Sheet

Product Information: (EN)

Publish date: Mar 26, 2021

PDF Document (FS5 Thrive Spec Sheet.pdf | 160 KB)