Altra Vanish Carbon 2 This performance-focused speed shoe is assuperas it gets, with a full-length carbon fiber plate, lightweight foam, and rocker shape for epic propulsion. We made it faster. The Vanish Carbon 2 features a full-length carbon fiber plate, even more lightweight midsole foam for a soft feel, and improved flexibility. Its ready to rocket you through a tough speed workout and obliterate PRs on race day. Negative splits? Oh, positively. We built it to perform by increasing the stack height from 33mm to 36mm, with Altra EGO PROmidsole foam thats 32% lighter in weight. This updated foam is more pliable, for added cushion and response. An updated full-length carbon fiber plate delivers a 14% increase in asymmetry, allowing for a more natural (and probably faster) stride. This redesign overhaul combined with additional flex grooves in the outsole gives you 75% improved flexibility. With a roomy toe box with space for your toes to move freely, snug midfoot, and zero dro