Design: Soft suede detailing and anti-slip laces to lock it in In-Shoe Comfort: SPEEDROLL Technology propels you forward effortlessly, so you can run faster, not harder Full-length, responsive nylon plate gives you an edge for daily speed workouts and race day Ultralight PWRRUN PB gives you incredible spring and energy return FORMFIT hugs the foot in 3D comfort and delivers our most personalized fit yet Engineered mono-mesh keeps the upper light and breathable Durability & Traction: XT-900 outsole with reinforced high-abrasion zones provides optimal traction and durability