Mixed terrain Upper: Engineered mesh / TPU film Bottom: Vibram Megagrip outsole 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 Outsole pattern inspired by tyre tread Multi-directional triangle lugs on forefoot provide powerful grip on uphill trails Increased forefoot width by 4% and heel width by 15% Vibram Megagrip outsole offers unparalleled grip on wet and slippery surfaces Upgraded EVA mid sole with 20% rebound improvement for lightweight cushioning rebound KAILAS 4-point gaiter holder system prevents debris from entering Trapezoidal heel design to increase stability of the heel center of gravity