Bring more bounce to race day in the men’s Nike Alphafly 4 “Proto.” This road racing shoe pairs updated Air Zoom cushioning with advanced ZoomX foam for a lighter, bouncier ride than the Alphafly 3.

The evolved Air Zoom unit delivers a softer, quieter feel and more energy return than the previous model. A wide carbon fiber Flyplate adds a propulsive sensation while maintaining stability over the distance. The lighter Atomknit upper offers improved breathability and containment, while added cushioning in the curved forefoot rounds out the underfoot feel.

With smooth transitions and a responsive ride, the Nike Alphafly 4 “Proto” brings fresh energy to your next marathon.

Weight: Approximately 188 g / 6.6 oz (men’s US 8.5)
Heel-to-toe drop: 8 mm