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SelectFlex Rx Logo

The First Ever Adjustable Orthotic

Relieve foot pain while improving performance with SelectFlex Rx, powered by iFlex® technology. Easily adjust SelectFlex Rx to match your activity level throughout the day. A simple turn of the key dials in optimal comfort, superior performance and improved health.


Why SelectFlex Rx?

Benefits & Features

  • Achieve pain relief, optimum foot health & comfort
  • Change physical attributes with each adjustment
  • Increase energy return
  • Provide your feet with what they lack anatomically
  • Dial in arch support, comfort & control
  • Reduce & correct pronation
  • Restore alignment of bones and joints in your feet
  • Added performance & motion control with each step

How It Works

SelectFlex Rx works like an adjustable, life-like ligament underneath your arch, biomechanically absorbing forces according to the selected comfort zone. Developed and engineered by the leading foot and ankle experts in America, SelectFlex Rx® is the first orthotic to enable personalized comfort.

How to Adjust SelectFlex Rx

Line up the black arrow on the adjuster key with the white notch in the heel port. Then, insert the adjuster key and rotate to 1, 2, or 3 comfort zone


Apex Selectflex-RX | Moderate Arch Support

For moderate arch support

Apex Selectflex-RX | Moderate Arch Support

For next level arch support

Apex Selectflex-RX | Moderate Arch Support

For the most aggressive arch support