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Table 1 Hardness of Insoles - SHORE 'A' Scale

From: Firm insoles effectively reduce hemolysis in runners during long distance running - a comparative study

Insoles

Hardness

Sole - A*

44 - 49

Sole - D†

32 - 36

  1. * Sole - A categorized as firm insole
  2. † Sole - D categorized as soft soles