Nike Dragonfly 2 Elite Track & Field Distance Spikes Men to Women Sizing Men Size 7 = 8.5 Women Be among the first to know about restocks and new releases. Sign up for our Speed Shop Restock. The Dragonfly 2, one of the swiftest long-distance track spikes, ups the pace even further. Its comfortable fit and powerful propulsion are designed to endure races and crucial workouts. Expect updated spikes.