Designed for the runner looking for a barefoot feel, the Nike Spark Lightweight Socks feature sweat-wicking technology and mesh fabric for a dry and cool experience. Extra yarn in the footbed and ankle provide subtle micro-cushioning, giving you soft support with every step. Reflective design updates have been placed in key areas, making this sock stand out from previous versions. Reflective Design For Your Miles Nike have updated the Spark Lightweight Socks with reflective design details around the collar. Reflective-design yarns are also integrated into the mesh pattern at the top of the foot. Light On Your Feet Lightweight fabric gives you a 'barefoot' feel. More yarn in the footbed and ankle delivers micro-cushioning where you need it. Breathable Where You Need It Mesh at the top of the foot provides optimal ventilation. A striped pattern across the foot indicates where the mesh is placed.