ASICS Men's Gel Kayano 21 Running Shoe 100% Synthetic Imported Rubber sole Running shoe featuring mesh and FluidFit multi-directional upper with FluidRide bounce back cushioning Impact Guidance System Gait-enhancing Guidance Trusstic System Moisture-control Ortholite X-40 sockliner Guidance Line vertical flex grooves AHAR+ high-abrasion outsole