The New Balance Vazee Sigma Legacy Unisex Track Spikes Shoes in Dark Red / Black features a BOA® Fit System for a locked down fit, while a powerful 8-spike plate provides traction for distances up to 400m. Powerful. Aggressive. The Vazee Sigma Legacy is in a class by itself, designed for the NB Nationals Indoor with a heat-activated upper that changes color. This spike uses BOA® Closure technology, an alternative to traditional laces for customized comfort and no pressure points. A midfoot canopy and heel wrap hold the spike in place. An asymmetrical eight-spike plate provides traction with just the right amount of flexibility.