Purchased for trail racing but ended up needing a larger size. Super light, fast and responsive. Only ran in them a few times, 10-15 miles or so. KEY FEATURES Dual and parallel carbon-fiber plates (think independent suspension) WEIGHT 9.5 oz. (269 g) for a US M10.5 STACK HEIGHT/DROP 33 mm in heel, 29 mm in forefoot (4 mm drop) MIDSOLE Supercritical, nitrogen-infused midsole. Responsive and bouncy without being unstable. Questions? Leave a comment below!