Nike Lunar Speed - Men'sThe Nike Lunarspeed is a lightweight and responsive sprint running shoe. An ultra-light mesh upper offers the ultimate in breathability and fit. Dynamic Flywire technology loosens or tightens with the natural motion of the foot to provide support and stability. The Lunarlon midsole spreads force more evenly across the foot, providing ultra-lightweight, springy cushioning that helps protect the foot and improve stability and comfort for an enhanced running experience. Environmentally preferred rubber outsole with traction pattern is optimized for sprint training. Wt. 7.4 oz.