• Rock and roll: SPEEDROLL Technology propels you forward effortlessly, so you can run faster, not harder. Soft and speedy: A lofty bed of PWRRUN gives you a plusher take on SPEEDROLL, making this the perfect shoe for every distance and any day of the week. Streamlined stability: A trim new heel counter reduces weight while new slip laces provide a perfectly fit as you run. Lighter footprint: This style is vegan and contains recycled upper materials.