Up the tempo in these lightest and most responsive running shoes yet. The new Liberate Nitro is an ultra-fast option for short-distance runs and sprints, up to half-marathons. The simple mono-mesh upper is super-light and moisture-draining, so nothing can weigh you down, come rain or shine. A PumaGrip outsole and Nitro Foam midsole add traction and cushioning to these high-tech shoes.