CUSTOM SUPPORT. BUILT TO RUN.The Nike Spark Lightweight Socks are Breaking2-inspired with a fit that feels almost like going ""barefoot"". Supportive where it counts, they feature a ventilated pattern to help keep you comfortable with every step.Customized FitSnug comfort from the toe to the top of the sock helps create an almost ""barefoot"" feel. A triangular underfoot arch pattern supports your medial and lateral sides, and lets you wear your socks on either foot.Breathable MaterialsVentilated mesh at the top of the foot helps keep you cool.No-Slip DesignSpandex in the heel keeps the sock stable as you move. The secure design helps ensure the sock wont slip down on your run.Sweat-wicking technology helps you stay dry, comfortable and focused. More Details Reflective Swoosh design trademark85-87% nylon/13-15% spandexMaterial percentages may vary depending on color. Check label for actual content.Machine washImportedNot intended for use as Personal Protective Equipment100% TEXTILE