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.

• A new, data-engineered 8-spike plate provides traction with just the right amount of flexibility.
• Removable spikes for superior traction
• 8 spike configuration
• Women order a size and a half down
• Full Length Pebax Plate
• The Boa System® features a midfoot canopy and heel wrap for a truly customizable fit
• Knit upper
• No sew overlays
• Bootie construction