Minimalist Index
Minimalist Index
The MI was created by 42 researchers and healthcare practitioners from 10 different countries, including Dr. Ray McClanahan. Similar to the Correct Toes® Fundamental Five (F5), the MI is based on these characteristics: weight, flexibility, heel drop, stack height and motion control.
There is, however, one major difference between the two. The Correct Toes F5 also evaluates natural width of the toe box.

Flexibility
The more flexible the shoe the higher the score.

Weight
The lighter the shoe the higher the score.

Stack Height
The thinner the shoe the higher the score.

Stability and Motion Control Technologies
The less controlling the shoe the higher the score.

Heel to Toe Drop
The more flat the shoe the higher the score.