There's a reason the Northwave Extreme Tech Mountain Bike Shoes are named as such...they're packed full of on-the-edge technology to take you to new levels of efficiency, performance, and off-the-bike comfort. A 3D carbon sole puts power directly to the crank, the upper is tough but pliable for unprecedented comfort, and vented to keep your dogs cool and dry. Plus, a ratchet/speed lace combo for closure means a fit optimized the whole ride through. Speedlight 3D Carbon sole with rubber lugs. Efficient fit Thermowelded reinforcement offers protection from impacts and ensures durability. Arch support features large vents for optimum cooling.