Details The ultimate running shoe engineered to propel you forward with every stride, the Valkyrie Speedworks runner is equipped with an anatomical toe box and the LaunchPX midsole that features a full length nylon plate, positioned between two full length pieces of 100% Pebax® supercritical foam for ultimate comfort, response and durable support for any movement. This runner features an Alphaweave upper for unmatched breathability that's perfect for extended runs. Whether you're chasing a personal best or tackling your first marathon, trust in our shoe to take you the distance in style and performance. Technology LaunchPX midsole constructed with a nylon plate and 100% Pebax® supercritical foam Features Ultra lightweight Hyperweave breathable construction Anatomical toe box 100% Pebax® supercritical foam Locking laces for a secure fit Molded sockliner for comfort and support Lockdown reinforcement paneling for security and stability Gusseted tongue to prevent shifting 6mm heel-to-toe drop Stack Height: 39.5mm(heel) 33.5mm(forefoot)