ASICS Men's GEL-Fluent 3 Running Shoe 100% Synthetic and mesh Rubber sole California Slip Lasting offers stability and comfort, reflective materials enhance visibility during low light hours Removable Sockliner accomodates orthotics Rearfoot GEL Cushioning System attenuates shock during impact phase and allows for a smooth transition to midstance Trusstic System reduces the weight of the sole unit while retaining the structural integrity of the shoe AHAR (high abrasion rubber) is placed in critical areas of the outsole for exceptional durability