True to size: This footwear is true to size for a supportive comfortable fit. Combining a 3D dual-density Pebax footplate midsole rocker geometry and SurfaceCTRL grip our VECTIV technology is designed to maximise energy on the trail. And in the Infinites this translates as the perfect balance of responsiveness and support in ultra-distance trail running shoes. The soft-ground design delivers high-level traction on extremely technical terrain. The tongue wings reduce slippage while enhancing the step-in comfort and fit. And our updated D-width last accommodates a broad set of consumer foot shapes. Compared to the original our Infinite II Trail Running Shoes have a 10 mm greater toe spring 1 mm more cushion and 1 mm greater lug depth for better traction on rocky trails. All this means you'll be fully supported while the rockered midsoles propel you into your next gait cycle.