Trail running, mixed terrain,City Upper: Engineered mesh / TPU film Bottom: Vibram Megagrip outsole, Litebase Lining: Sandproof and breathable lining The BOA® Fit System delivers micro-adjustable, precision fit engineered to perform in the toughest conditions The BOA® Fit System is guaranteed for the lifetime of the product on which it is integrated Tyre-like Lugs for Powerful Grip Multi-directional triangle lugs on forefoot provide powerful grip on uphill trails 125mm ultra wide forefoot adds more grip area Vibram Megagrip outsole offers unparalleled grip on wet and slippery surfaces Heel Support System TPU heel support frame stabilizes ankle and helps with lateral ankle movement Drop:6mm