All-over reflectivity and water repellency help keep your feet dry. Flywire technology locks the foot down. Water-repellent Flyknit construction helps keep your feet dry. All-over color reflectivity for visibility in low light. WaterShield liner helps keep your foot dry. Dual-density Lunarlon foam for stability in a soft, cushioned ride. Pressure-mapped outsole for traction minus the weight.