Built for the grind of race day, it’s light, responsive, and brutally efficient. The Vanish Carbon 3 is Altra speed – reimagined. An all-new FAST RCE midsole is a supercritical, two-piece full PEBA foam that’s our lightest and most responsive, made for a fast and efficient ride. A patent-pending split-toe carbon fiber plate provides the rigidity to fuel speed while allowing the big toe to engage in a more powerful way. Our unique last shape combined with an enhanced rocker and 4mm drop propels runners forward with each step for a fun and fresh experience. Altra’s Racing FootShape™ provides a secure heel and midfoot at high speeds but maintains room in the toe box so your toes can splay and engage for more power. A race-day upper is designed for a seamless, breathable engineered mesh with a soft, lightweight tongue for a zero-distraction feel. An innovative eyestay design ensures proper midfoot lockdown while keeping the toes free to splay. In lab testing, the Vanish Carbon 3 improved running economy by 2.6% compared with the Vanish Carbon 2, rivaling current super shoes in the market. So you can keep crushing through the whole 26.2, without crushing your toes. Unlock your power and lock in on super natural performance in a shoe made to chase PRs. | altra Women's Vanish Carbon 3 Shoe in White/Black/Fiery Coral, Size: 5.5