The newly improved Saucony Kilkenny XC7 cross-country spikes are designed to provide comfort and superior fit for runners to tackle their next PR. These spikes feature lightweight FLEXFILM overlay material that gives the foot zero-distraction support. Upper: FlexFilm no-sew overlays enhance fit without adding weight. Lightweight mesh offers breathability and flexibility. Flat laces reduce irritation and pressure points. Padded heel collar enhances comfort. Midsole: SSL EVA offers lightweight responsive performance. Outsole: 4-pin Pebax® spike plate configuration provides the best possible propulsion. XT-600 carbon rubber outsole material delivers outstanding abrasion and traction properties. Comes with 8 spikes and wrench.