A snug fit with comfort within, get these Nike 3-Pack Performance Lightweight Socks to take on your workout. Arch band provides snug comfort and helps prevent the sock from bunching. Micro-nylon and spandex fabrics provide a soft feel. Interior anti-slip silicone heel pad helps keep sock in place. Stretchy fabric for snug comfort and breathability. 57% nylon/40% polyester/3% spandex. Imported.