ASICS Men's GT-2000 4 Lite-Show PG Running Shoe 100% Synthetic Imported Rubber sole I.G.S (IMPACT GUIDANCE SYSTEM) TECHNOLOGY - ASICS design philosophy that employs linked componentry to enhance the foot's natural gait from heel strike to toe-off. FLUIDRIDE MIDSOLE - FluidRide provides the ultimate combination of bounce back and cushioning properties with reduced weight and exceptional durability. REFLECTIVITY - Contains reflective materials designed to enhance visibility during low light hours. PLASMAGUARD UPPER TECHNOLOGY - Your shoes are protected from rain and mud without the loss of breathability or flexibility through PlasmaGuard, an innovative coating technology patented by Europlasma REARFOOT AND FOREFOOT GEL CUSHIONING SYSTEMS - Attenuates shock during impact and toe-off phases, and allows movement in multiple planes as the foot transitions through the gait cycle.