COMFORTABLE FIT WITH VENTILATION… The Nike Everyday Plus Lightweight Socks provides low-profile comfort with a mix of micro-nylon and spandex yarns. The sweat-wicking design is breathable on top to keep your feet cool and dry… Product Features: Dri-FIT technology helps keep your foot dry and comfortable… Arch band feels supportive and snug… Breathable construction on the top… Interior anti-slip silicone print on the heel helps reduce slippage… Product Feature Subheads: Product Details: 57% nylon/40% polyester/3% spandex. Machine wash. Imported.