Nike Lunar Ballistec - Women's The Nike Lunar Ballistec is the ultimate incarnation of durability in a lightweight package for those tennis players that are hard on their shoes. The upper features synthetic leather combined with dynamic Flywire technology for an incredibly adaptive fit. As you move laterally and plant your feet the Flywire tightens to provide a stable wrap on your foot. The Nike drag-on cage technology offers enhanced flexibility and support with unique data-informed pattern for tennis-specific stability. The midsole of the shoe comes complete with Nike Lunarlon construction that is specifically configured for the tennis athlete and delivers superior lightweight cushioning. The outsole uses Nike XDR rubber throughout and its data driven design delivers thicker rubber in the highest wear areas for enhanced durability. Wt. 10.8 oz.