Trail running, mixed terrain Upper: Engineered mesh / TPU film Bottom: Vibram Megagrip outsole Lining: Sandproof and breathable lining Dual BOA® Fit System delivers micro-adjustable, precision fit engineered to perform in the toughest conditions Dual BOA® Fit System is guaranteed for the lifetime of the product on which it is integrated Multi-directional triangle lugs on forefoot provide powerful grip on uphills Washboard-like lugs on heel prevent slipping on downhills Vibram Megagrip outsole offers unparalleled grip on wet and slippery surfaces Dual-density midsole with PEBAX supercritical foam technology ensures that 70%-72% energy can be returned TPU heel support frame stabilizes ankle and helps with lateral ankle movement KAILAS 4-point gaiter holder system- An anti-debris gaiter can be attached to the shoes firmly, preventing debris from entering the shoe Drop: 8mm