Sorbothane 3/4 Rigid Arch provides the most aggressive arch support in the Sorbothane line of insoles, offering maximum stride-correcting stability for use with dress, casual or athletic shoes' existing insoles. And because they are Sorbothane, 3/4 Rigid Arch insoles offer unrivaled shock absorption and foot strike protection, which prevents fatigue and injuries, to enable you to do what you love, even longer.