Lightweight, flexible, and aggressive, the New Balance XC900 is the perfect spike to help you take on the cross-country course with confidence. Breathable FantomFit upper uses no-sew overlays for lightweight support. REVlite midsole for lightweight, responsive cushioning with every step. Flexible six-spike outsole plate with aggressive lugs for traction on any cross-country course. Includes 1/4" pyramid spikes and wrench. Wt. 5.9 oz.