PDAC Approved L1951

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Fitting Instructions

Decision Tree


The SpryStep® is an elegant, durable and effective ankle foot orthotic made with a precise selection and layup of diverse composite materials. The posterior spiral strut is uniquely positioned to amplify energy return and fit easily into most shoes.

Recommended for: Excessive plantarflexion during swing phase (secondary to weak dorsiflexors) / Weakness of the pretibial muscles <=3 / Plantar flexor strength 4 / Mild knee instability during stance phase / Mild Knee hyperextension


  • Lightweight, durable composite construction engineered with unique laminated characteristics to prevent delamination and breakage
  • Material diversity offers strategic flexibility and stiffness to enhance performance and patient comfort
  • Proprietary posterior lateral position of the strut increases patient compliance and amplifies energy return
  • Trimmable forefoot ensures a perfect fit
  • Fits easily into most shoes
  • Custom version available based on size, pathology, or activity level
Size Foot Length Height
XS 8 1/2 – 9 5/8 11 3/4
SM 9 1/8 – 10 1/4 12 5/8
MD 9 5/8 – 10 7/8 13 3/8
LG 10 1/4 – 11 3/8 14 1/8
XL 11 3/8 – 12″ 15″

Additional information


Left, Right




Fiberglass (recommended brands are C-Form from ST&G, Delta Conformable BSN, Delta Lite BSN and Össur Techform)

Recommended Technique

  • Dry casting (with fiberglass)
  • Use of a casting platform


Sitting in a chair

  • Using casting platform to replicate heel height and toe ramp (or another system allowing to replicate heel height and toe
  • Metatarsal touching the casting platform
  • Optimal sagittal alignment: correlates with heel height of
    the shoe (+/- 5° of the functional alignment)
  • Optimal coronal alignment: to represent biomechanical
    goals (+/- 3° of functional alignment)
  • Tibial inclination of 7°