Running generates an average of 2kN of force into the joints with each step! FP Insoles are lab certified to absorb 90% of a 2kN impact, millions of times. The average insole only absorbs 40-53% when brand new and quickly degrades.
7.75*31.5, 7.8"x31.5", 8.15"x31.5", 8.0"x31.5"
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