Retooled with SMOOTH SPEED ASSIST geometries specifically designed to keep you stable and fast when it counts and powered by highly responsive MIZUNO ENERZY XP foam with a glass-fiber reinforced MIZUNO WAVE Plate, the Wave Rebellion Flash 3 is ready to bring a snap to every run. Plant-based material (Pebax RnewA(R)) infused MIZUNO ENERZY LITE. MIZUNO ENERZY (FOAM): Offering versatility in its application, while still maintaining softness and resilience. It will help enhance performance capabilities. Glass Fiber Infused Nylon MIZUNO WAVEA(R) Plate: Super responsive with increased flexibility for a gentler ride with medial and lateral support. Smooth Speed Assist: Mizuno's signature geometry that is designed for maximum performance. The significant heel bevel encourages an efficient midfoot landing, the midfoot contact point supports the calf and the aggressive forefoot rocker delivers a smooth and propulsive transition. Engineered Mesh Upper: Both breathable and durable for high performance. Internal Support Strap: Securely holds mid-foot area. Lightweight Heel Counter Triple Shoelace Loop: Keeps tongue in correct position while running. Rubber Outsole: Designed for a softer landing. Eco Friendly Materials: Recycled materials