Men's ZOOT® ULTRA RACE 4.0 :: Race stronger than ever in the no-compromise, high-performance construction of the men's Zoot® Ultra Race 4.0. Lock in the stability and comfort of a perfect fit with the Boa Lacing™ system, a technology that makes this the only tri-running shoe on the market with true 360º lock-down. Cash in on the comfort of the UltraFit™ upper for incredible cushioning and extra support, and get effortless toe-off thanks to the Carbon Span+™. 8.4 ounces