In its fourth edition, the Mach 4 takes its biggest leap forward, built on themes inspired by the RocketX and Carbon X. This everyday running shoe delivers a lively ride and energetic underfoot feel that is unquestionably HOKA. Softer and bouncier than the previous iteration,the Mach 4 employs a harmonious blend of foams - merging an incredibly soft, lightweight foam ontop with rubberised foam directly beneath. This up-tempo shoe has been created with a new pull tab,revamped upper made from heat pressed TPU embroidered yarns, and a refined collar shape thatalleviates pressure on the Achilles. Light, fast and unquestionably responsive, the Mach 4 delivers adaily dose of speed. HOKA Women\'s Mach Shoes 4 in Blue Glass/Coastal Shade, Size 5.5