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..
8 spike configuration
Bootie construction for a custom like fit
Removable spikes for superior traction
The Boa System® features a midfoot canopy and heel wrap for a truly customizable fit