Men's Size: 12 To 13Personal Anti-Fatigue Mat (PAM) Insoles Represent A Unique And Cost Effective Opportunity For The Selective Relocation And/Or Replacement Of Expensive Anti-Fatigue MattingDual Layered Memory Foam Technology For Maximum Comfort And Shock AbsorptionMemory Foam Compresses For Safe Clearance In Steel Toe FootwearErgonomically Designed By A PodiatristReduces Muscle Strain, Improves Balance Reactions And Increases Blood CirculationInsole Is Machine Washable