The Kalani 3.0 was designed to meet the demands of the runner looking for the most comfortable, high-mileage neutral trainer. Extremely light and incredibly comfortable, this covers all the boundaries. The internal construction of Barefit technology puts Zoot seamless technologies closest to the foot, for exceptional internal feel and long-distance comfort.It utilises Z-bound technology in the midsole. This consists of a lightweight and resilient compound, responsible for the responsive ride. Z-bound has a very high-energy return and so the result is less weight and great response.The CarbonSpan Plus shank is lighter, stronger, and tuned to your running. It provides a smooth powerful toe off in the way that plastic would fail to do so.To add to all this, the Zoot Ultra Fit Upper is a compression-like upper used on all Zoot footwear, and this is no different. It gives the shoes an extremely comfortable fit that hugs your foot, meaning less clutter, a better fit, and more comfortable feet.There is also asymmetrical lacing to work with the anatomy of the foot and wrap the arch securely in place.