Why You'll Love It:  Full-length ZoomX foam, Nike’s lightest and most resilient foam, provides energy return with each step Category: Distance Track Spike Weight: 5.1oz One of the fastest long-distance track spikes to ever cross the finish line turns up the tempo even more. The Dragonfly 2’s comfortable fit and propulsive feel are built to go the distance in races and key workouts. Updated spikes, full-length ZoomX foam and a lighter, more responsive plate are ready for speed and stamina. KEY FEATURES Stable for Straightaways: A slightly wider midfoot and forefoot compared to the previous iteration improve the feeling of stability on straightaways and especially around turns. We removed two spikes seen on the original in favor of a four-spike design. And we elevated the big-toe side platform and updated the heel structure for added stability. Light and Fast: The new full-length plate material is lighter and more responsive than the previous version while adding durability. The curved design gives you a propulsive feel. Breathable Comfort: Engineered mesh on the upper enhances breathability and comfort. Its conforming fit gives you a disappearing sensation that is built to go the distance. SIZING GUIDE Unisex shoes use men's sizing. For a women's fit, take your general shoe size and subtract 1.5 (ie: a women's 10 would be a unisex 8.5 for this shoe)