Fusion® Foot


The deceptively simple design of the Fusion Foot provides superb multiaxial movement and vertical shock absorption during ambulation and delivers a high level of energy storage and return to patients. The integrated design allows the composite shank, heel and foot plate to work together as a unit versus independently. As a result, the Fusion Foot delivers vertical shock absorption, smooth heel-to-toe transition, inversion/eversion, and strong energy return all in one mechanism. The Fusion Foot is field-adjustable for inversion/eversion, heel stiffness and overall trim height. Two snubbers allow the bottom of the composite shank composite heel to run parallel to the foot plate allowing both plates to bend and flex providing response and stability on uneven terrain. The foot shank may  be trimmed and requires no drilling of holes. Three proximal adapters are available for the Fusion Foot: Rotating Pyramid, Pyramid Receiver, and a Torsion Receiver. The Torsion Receiver provides 24 degrees of internal and 24 degrees of external rotation for more natural movement.

Product Highlights:
  • Provides Outstanding Inversion & Eversion
  • Lightweight foot at 380 g
  • Design Provides Vertical Shock Absorption
  • Extremely Easy to Align
  • Delivers smooth heel-to-toe transition
  • Choice of three Proximal Adapters
  • Torsion Receiver Provides 24 Degrees Rotation Internally and Externally
  • Ask about the optional precut version available at no extra charge.
Includes Full-Height Foot Shell†, Foot Sock,
Pyramid Reciever or Rotating Pyramid,
1 of 6 Toe Spring Options, 2 Heel Wedges,
2 Diameters of SnubbersNote: Size 23-24 cm and 31 cm feet come with a High-Activity Foot Shell.
Weight 380 g*
Adapter Weights Pyramid 205 g; Receiver 190 g; Torsion Receiver 420 g
Patient Weight Limit Foot Size 23-24 cm: 230 lbs (104 kg)**
Foot Size 25-26 cm: 270 lbs (122 kg)**
Foot Size: 27-31 cm: 300 lbs (135 kg)**
Heel Height 3/8″ (10 mm) or 3/4″ (18 mm)
Build Height*** Pyramid Receiver: 15.7 cm for 3/8” heel, 14.81 cm for 3/4” heel
Pyramid Adapter: 15.4 cm for 3/8” heel, 14.43 cm for 3/4” heel
Torsion Receiver: 20.33 cm for 3/8” heel, 19.35 cm for 3/4” heelFor build height measurements, proximal adapter installed and shank cut at minimum height line.
Available Sizes 23 to 31 cm
Toe Resistance Toe Spring Chart (click to view chart)
Cosmesis Lifelike in Buff, Tan or Medium Brown
Heel Spring Options Two Wedges (included with each foot)
U.S. Warranty Information


Foot:   36 months from date of patient fitting
Foot Shell:   9 months from date of patient fitting
Torsion Receiver:   24 months from date of patient fittingNOTE: No credit will be issued after 45 days from order date. Exceptions will only be made for warranty returns due to product failures.
U.S. L-Code Suggestions L5987, L5986 & L5984 with torsion receiver

* Based on size 26 cm cat 3 foot without Proximal Adapter, Foot Shell, or Foot Sock.
** Body weight plus any loads normally or routinely carried cannot exceed this weight limit.
*** Build height measurements taken for a size 26 cm foot with WillowWood components. Measurements will vary if using non-WillowWood components.
† Full-Height Foot Shell included for sizes 25-31 cm. High-Activity Foot Shell included for sizes 23-24 cm.

To order a Fusion Foot, please select the size, side, color, toe spring stiffness, and heel height. To order a precut version of the Fusion Foot at no extra charge, use the add-on code FFT-PRECUT.

FFT-23LB-1L-1 Fusion Foot SAMPLE Part Number
Name Code FFT FFT = Fusion® Foot
Size of Foot 23 23 to 31 cm
Side of Foot L L = Left
R = Right
Foot Shell Color B B = Buff
M = Medium Brown (special order)
T = Tan (special order)
Toe Spring Stiffness 1 1 to 6 (click to view chart)
Heel Height L L = Low 10 mm (3/8″)
M = Medium 18 mm (3/4″)
Proximal Adapter 1 1 = Pyramid Adapter
2 = Pyramid Receiver
3 = Torsion Receiver

Fusion Instructions 
Fusion Instructions, Spanish 
Adjusting the Heel Resistance
Replacing the Snubbers
Replacing the Composite Heel
Installation Instructions Proximal Adapters
Torsion Receiver Installation Instructions
Fusion Foot: Test for Vertical Deflection

Related Products
Product No.
FND-136101 Pyramid  Adapter
FND-136102 Pyramid Receiver
Torsion Receiver
FND-136146 Height Extension Adapters, 46 mm
FND-136124 Height Extension Adapters, 24 mm
FSHT-XXXX-X Full-Height Foot Shell, 25-30 cm – for a complete
product number, specify size, side, color, heel height
FSHA-XXXX-X High-Activity Foot Shell, 23-24 cm – for a complete
product number, specify size, side, color, heel height

Fusion® Foot
The Fusion Foot provides superior multiaxial movement, vertical shock, high levels of energy storage and return, and impressive inversion and eversion.

Instructional Video Fusion® Foot
Learn how to order, assemble, adjust and align the Fusion Foot.

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