Sturdy and wear-resistant model for ticking up the miles in base endurance training - you miht want to do your interval sessions with the lightweight Kinvara model, for example - Did you know that alternating between two pairs of running shoes will extend the life of each and reduce your risk of stress injuries? - FORMFIT - the shoes fit extremely comfortably around your feet - Soft PWRRUN shock absorption in the middle and more springy PWRRUN + in the front - Speedroll structure helps to direct your force forward - The TPU heel provides even better support for the foot - More breathable surface fabric - The surface fabric is 100% recycled fiber - Drop from heel to front: 4 mm, heel height 38 mm, front height 34 mm - The sole has durable XT900 rubber reinforcements