Who doesn't want to go Mach speed? Our thoughts, exactly. Delivering light-on-your-feet cushioning with high-energy foam, our latest Mach 7 delivers the same snappy, responsive ride as its predecessor with a brand-new look. A tried-and-true trainer that employs speed focused design details throughout, we've enlisted a creel jacquard upper with zonal breathability and an internal gusset to deliver the locked-in fit to set your next PR. | Creel jacquard upper. Refined, speed-centric tongue. Internal gusset. Super-critically foamed EVA. Sticky rubber forefoot. Durabrasion rubber at the heel.