HOW OFTEN SHOULD INSOLES BE REPLACED (and why own more than 1 pair)? Oct 08, 2022 Posted by: Barry Renow Balance, Best Insole, Biomimetics, Construction Worker Safety, Energy Return, Fallen Arches, Flat Feet, Foot Biomechanics, Foot Conditions, Foot Ergonomics, Foot Support, How to, Orthotic Insoles, SelectFlex 3 Factors that Affect Insole Replacement Like shoes, insoles have a lifespan and wear down over time, but how quickly depends on 3 primary factors: