Design: An updated woven upper gives you security and containment at a significantly lighter weight than the Ja Fly 3, but with more breathability The Nike Racing shoelace is lightweight with notches and just a little stretch that allows for a secure fit that stays tied in all conditions Traction & Durability: Completely new plate using computationally designed hexagons delivers stiffness in key areas to help you fly off the starting line and maintain speed throughout the race Data from hundreds of runners helped inform the outsole Additional Details: Designed for 60 to 400 meter events