Aggressive. Bold. Victorious. Meet the 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. Pre-owned condition. All reasonable offers considered! 😊 Please consider taking a moment to see what else we have to offer in our closet. It would be much appreciated! 👍