Made for those days when you want to push the pace. The Mizuno Wave Rebellion Flash 2 now includes SMOOTH SPEED ASSIST to help you achieve your ideal gait and a glass fiber-reinforced wave plate. MIZUNO ENERZY LITE+ and MIZUNO ENERZY FOAM provide enhanced cushioning and energy return. Features: --Plant-based (Pebax Rnew®) infused MIZUNO ENERZY LITE + top layer responsive cushioning --MIZUNO ENERZY bottom layer cushioning --Glass Fiber Infused Nylon MIZUNO WAVE® Plate --Smooth Speed Assist: Unique heel to toe geometry designed to lessen muscle tension and promote a natural mid-forefoot strike. --Engineered Mesh Upper: Both breathable and durable for high performance. --Internal Support Strap: Securely holds mid-foot area. --Lightweight Heel Counter --Triple Shoe;