Designed for runners looking for a "barefoot" feel, Nike Spark Lightweight socks feature anti-perspiration technology and mesh fabric to keep your feet dry and cool. Additional fibers in the underfoot and ankle provide subtle micro-cushioning, giving support and flexibility with every step. Reflective details in key areas make this sock stand out from previous versions. Reflective threads are also integrated into the mesh pattern on the top of the foot. The lightweight fabric offers a "barefoot" feel. Additional threads in the sole and ankle provide micro-cushioning where you need it most. Mesh over the top of the foot for optimal breathability. Striped pattern on the foot indicates where the mesh is placed. Nike Dri-FIT technology wicks sweat away for faster evaporation, keeping you dry and comfortable. Contoured arch band wraps the foot for a snug fit.