Soft, breathable and lightweight, the Sport Loop features a hook-and-loop fastener for quick and easy adjustment. The double-layer nylon weave has dense loops on the skin side that provide soft cushioning while allowing moisture to escape. The Sport Loop contains 100% recycled spandex, 100% recycled polyester and 85% recycled nylon, some of which comes from discarded fishing nets. 100% of the manufacturing electricity is covered by clean energy.º Apple Watch Sport Loop Material: 80% recycled nylon, 100% recycled polyester, 100% recycled spandex