Design: Designed for the great outdoors; excellent for trail runs, light hiking or exploring a new city GEL(R) Technology Cushioning provides excellent shock absorption Durability & Traction: This model has been updated with a more accommodating forefoot fit, while reducing the amount of overlays around the forefoot without sacrificing durability The outsole is more durable with a traction pattern that's been improved with re-engineered lugs under the heel