Custom foot box is indicated when:

• A. LEs are perfectly aligned with body midline.
• B. The device is not customized.
• C. LEs are not aligned with body midline as with a windswept deformity.
• D. Indicates feet are aligned.

Answer: (C)

A custom foot box is used when there is asymmetry in how the lower extremities align with the body's midline, such as in windswept deformity. In windswept deformity, one leg deviates medially while the other deviates laterally, so the feet do not sit symmetrically inside a standard, uniform foot box. If you use a standard, noncustomized foot box, this misalignment can create uneven pressure, poor contact, and instability at the base of support. By crafting a foot box to fit the actual position of both feet and ankles, you ensure proper alignment, better load distribution, and increased comfort and function. If the limbs are truly aligned with the midline, or the device is not customized, a standard foot box is typically adequate.