New no box Cushioning: Light and responsive PWRRUN midsole that delivers a snappy, springy ride without sacrificing underfoot protection. Drop & Stack Height: Features a natural 4 mm heel-to-toe drop with a 28.5 mm heel and 24.5 mm forefoot stack. Upper: Completely redesigned single-layer engineered mono-mesh that is stripped-down, highly breathable, and provides a secure, locked-in fit. Outsole: Minimalist design utilizing strategic, durable XT-900 rubber pads in high-wear zones (toe-off and heel) for traction without extra weight. Sustainability: Vegan construction incorporating recycled upper materials.Best Use: Versatile and agile enough for fast 5Ks, 10Ks, track intervals, and mid-distance runs.