Design: 3D-engineered fascia offers a clean overall look Tonal medial TPU guidance frame in the upper helps deliver 360 degrees of stability In-Shoe Comfort: FORMFIT provides an enhanced, distraction-free fit and a lighter feel on foot Newly formulated PWRRUN foam packs in more responsiveness with a softer feel than most other EVA formulations Delivers a livelier sensation than what stability-seeking runners are accustomed to Additional Details: Predecessor: Guide 13