Reach for the Sky 7 when you want a lightweight choice that hugs your foot in all the right places, thanks to the smooth stretch woven upper made from recycled materials.  MIZUNO ENERZY CORE delivers high energy return and cushioning, creating a perfect recipe for memorable runs every time. MIZUNO ENERZY CORE: New advanced midsole material, delivering the most resiliency and softness. It improves comfort and adds spring to drive optimum performance. MIZUNO ENERZY (FOAM): Offering versatility in its application, while still maintaining softness and resilience.  It will help enhance performance capabilities. Foam Wave: A Wave of comfort made of 2 layers of foam.  Top layer is U4icX and bottom layer Mizuno Enerzy Foam Wave: A Wave of comfort made of 2 layers of foam.  Top layer is U4icX and bottom layer Mizuno Enerzy Smooth Stretch Woven: Designed to control stretching direction for running motion and performance. Smooth Stretch Woven adapts to your foot and keeps your foot position correct. Gusseted Tongue: Stretchy tongue lining that hugs the foot securely and comfortably without any stress. X10 Outsole: Durable carbon rubber that allows for longer wear. Eco Friendly Materials: Recycled materials