The Nike Lunar Ballistec delivers incredible performance through its lightweight design specifically engineered for tennis players. Synthetic leather upper combined with Nike dynamic Flywire technology offers an incredibly adaptive fit that hugs your foot as you cut and change directions. Nike Lunarlon construction is specifically configured for the tennis athlete and delivers superior lightweight cushioning to make you quicker while protecting your feet. Nike XDR rubber and data driven outsole design delivers thicker rubber in the highest wear areas for enhanced durability. Wt. 12.7 oz.