The soft, breathable, and lightweight Sport Loop features a Velcro closure that allows for quick and easy adjustment. The double-layer nylon fabric has dense loops on the skin side, providing soft cushioning while wicking moisture away. This fabric is made up of 82% recycled yarns, some of which contain material from discarded fishing nets. This band is climate neutral. The Sport Loop is made of 45% recycled material, 100% of the energy used in its production comes from clean energy, and at least 50% of all climate-neutral Apple Watch products are shipped without the use of airplanes.