A new, data-engineered 8-spike plate in the New Balance Sigma Harmony unisex track spikes running shoes in White, providing traction with just the right amount of flexibility. Aggressive. Bold. Victorious. Meet the all-new Sigma Harmony, designed for the most demanding sprinters. Built on a new plate, this model provides a smoother and more powerful transition than its predecessor. Using BOA® Closure technology, it offers an alternative to traditional laces for customized comfort and no pressure points. A midfoot canopy and new knit heel construction hold the spike in place for PR-ready performance.