Originally Inspired by tired feet at the end of Badwater 135, the Paradigm continues to innovate with the updated 4. This max cushion shoe features the performance of the Altra EGO midsole and the comfort of a knit upper. This shoe stands out from the crowd with its unique take on guidance with integrated StabiliPods for a stable platform and a GuideRail system for guiding support when you need it, but not when you don’t. The asymmetrical design with medial flaring increases lateral support for weak or tired feet and is great for both neutral runners and those looking to upgrade from over structured “traditional stability” options. Allows your toes to relax and spread out naturally for more comfort and stability in uphill climbs and downhill descents. Places your heel and forefoot the same distance from the ground to encourage proper, low-impact form throughout your trail run. The Fit4Her technology means we customize every women's shoe to the unique anatomy of the female foot. Acts as a stabilizing tripod by enhancing the three natural stability zones in your foot to help prevent excessive foot collapse or pronation. A feature found on our dynamic support shoes that acts like a highway guide rail to provide guidance only when you need it. ALTRA EGO Dual-Nature midsole compound with a responsive, yet soft feel for increased energy return.