ASICS Men's GEL Fuji Endurance Running Shoe 100% Textile and 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. Trail Specific Outsole: Reversed lugs provide uphill and downhill traction on all types of terrain. Rock Protection Plate: Provides protection against stone bruises. Rock Protection Plate: Provides protection against stone bruises. Water-Resistant Upper: Provides a highly water-resistant upper without loss of breathability.