Mixed terrain / Long distance / Wet conditions / Winter Upper: Tightly-woven windproof mesh/ TPU overlay Lining: Gore-Tex waterproof membrane Outsole: Vibram rubber outsole Vibram Megagrip with a 4% more width on forefoot and 15% more on heel increases the grip area and improves traction on both dry and wet terrains. ECCEVAI plush midsole increases 20% cushioning and rebound rate and reduces fatigue for ultralong distances. Upgraded last shape with a better wrapping on the midfoot brings better comfort GORE-TEX waterproof membrane keeps your feet dry and comfortable with its reliable waterproofing and high breathability AWS 3.0 Two-section Lace Tightening System strengthens wrapping and prevents feet from sliding, avoiding black toenails. Positioning: Long Distance / Cushion / Waterproof