Redesigned with reflective yarn,¹ the Nike Sport Loop is a soft, breathable and lightweight band that has a subtle shine. A hook-and-loop fastener and a woven pull tab featuring the Run Swoosh logo make it easy to adjust on the go. The double-layer nylon weave has dense loops on the skin side that provide soft cushioning while allowing moisture to escape. Apple Watch Nike Sport Loop¹ Material: 100% recycled polyester, 100% recycled spandex, 80% recycled nylon