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System Rx Technology

System Rx evolved through the careful study of the mathematical relationship between various foot shape and their prescribed custom made foot orthotics. Individuals who have experienced the benefits of custom made insoles and shoe inserts know just how life changing proper arch supports can be; correctly sized and supportive orthotics have an enormously positive effect on many lives.

The Analysis

When we set out to create our first custom shoe inserts, we knew we wanted to be able to recreate the support and relief patients were getting from custom molded foot arch support inserts without the expensive price tag. After studying over 133,000 pairs of orthotics made for foot care professionals nationwide, we found that there were 99 distinct shapes that were applicable to most feet most of the time. Imagining the foot as its length, width, and arch heights allowed us to mathematize the shapes of orthotics as well, which helped us to analyze and understand the art of biomechanics for insoles. Our research was complete: Most feet fall into a relatively small range of measurable dimensions. For example, most heel widths range from 40mm to 77mm, medial arches at their apex along the 1st metatarsal shaft range from 14mm to 23mm in height, and foot length from the posterior heel to the bisection of the 1st metatarsal head range from 118mm to 208mm (shoe sizes 1 – 15).


System Rx Orthotics are the simple and beautiful result of applying mathematics to foot orthotics. These shapes became the System Rx Shells, which you can order sized precisely to your unique foot length, heel width, and arch heights, at the correct rigidity for your weight and activity level! Watch the video above to learn more about correctly sizing yourself with System Rx Technology, only available at KLM Labs.

Click here to download the sizing chart accurately measure your special foot shape.


How to Order Value_Rx Orthotics

Go to to order online and save on top covers, extrinsic posting, and plantar fills.

If you are using KLM's standard prescription form:

  1. Select the checkbox labeled Value_Rx in the top right hand corner of the KLM Prescription form.
  2. Do not select another orthotic type on the form.
  3. Indicate the support required by selecting "More Rigid" or "More Flexible" under "Orthotic Strength" on the right hand column of the form. If nothing is selected, KLM will use semi-rigid as the default. Semi-rigid is equivalent to 4mm thick polypropylene, the standard rigidity for KLM's Sport All Purpose, Uniflex 2 and eTech_Rx products.
  4. Be sure to include the patient's age, gender, and weight, so KLM has as much information as possible to manufacture a correctly functioning device.
  5. Choose the top cover length and requested top cover material. No cover is also acceptable.
  6. Indicate the aspects of extrinsic posting if it is required.
  7. Add special additions and accommodations if they are required.
  8. Keep in mind that Value_Rx orthotics are manufactured using KLM's injection molded System_Rx shells. Therefore:
    1. Graphite and Fiberglass are not available.
    2. Intrinsic accommodations like Fascial Grooves, Skives, and Flanges are not available.
    3. The maximum heel cup depth is 16mm.
    4. Orthotic width cannot be adjusted.
  9. Please enjoy the extra savings allowed by the Value_Rx Correction Technique!