Nike Alphafly 4

Nike's latest evolution of the Alphafly, making some incremental but impactful improvements. It's about 30g lighter and has 10% more energy return than the Alphafly 3. It incorporates a new ZoomX LT foam, which is 17% lighter and offers 8% more energy return than standard ZoomX. Will this bring Nike back to the top? TBD. Available October 29th.