Working closely with world-class athletes, Nike created a running shoe that lowered the energetic cost by 4%, which in turn led to indisputable dominance on the marathon field over the last two years.

Now, the Swoosh is ready to shave down those finishing times even more with the debut of the Vaporfly NEXT%. Springboarding from the Vaporfly 4% findings, Nike sought to improve the moisture wicking abilities to keep the weight of the sneaker down as much as possible throughout the entire 26.2. Shalane Flanagan’s input led to the creation of VaporWeave, a fabric lighter than Flyknit that absorbs far less water.

The forefoot traction of the shoe has been modified as well for better wet-surface stability, with data taken from Eliud Kipchoge, Mo Farah, and Geoffrey Kirui. There’s more ZoomX in the midsole, and the offset was decreased from 11mm to 8mm for even more propulsion during the stride. With all these additions and changes, the shoe weighs exactly the same as its predecessor.