Model [ NK11246502]Nike Flyknit Racer Running Shoes Black/AnthraciteFit For CompetitionThe Nike Flyknit Racer Unisex Running Shoe provides an adaptive, lightweight fit with a racing-specific rubber outsole that delivers exceptional traction from your first to final mile. Lightweight SupportA single-layer Flyknit upper wraps your foot in a second-skin fit for incredible lightweight support. Adaptive FitDynamic Flywire technology adapts to your foot for a custom-like fit and secure lock-down. Ultimate TractionA Waffle rubber outsole with a diamond pattern designed specifically for racing delivers durable traction. More DetailsForefoot Nike Zoom Air unit for ultra-responsive cushioning. Full-length Phylon midsole for lightweight comfort. Weight: 6 ounces (men's size 10). Offset: 8mm Nike Flyknit OriginsNike Flyknit technology was inspired by feedback from runners craving a shoe with the snug (and virtually unnoticed) fit of a sock. Nike embarked on a four-year mission with teams of programmers, engineers and designers to create the technology needed to make the knit upper with static properties for structure and durability. Then the precise placement of support, flexibility and breathability-all in one layer-was refined. The result is a featherweight, form-fitting and virtually seamless upper.