The ultrathin, lightweight Trail Loop is made from a nylon weave creating a soft band with increased elasticity for a comfortable fit. The band is infinitely adjustable with a convenient pull tab for quick adjustments on the go. This band is carbon neutral. The Trail Loop contains 32% recycled content by weight, 100% of manufacturing electricity is covered by clean energy, and 50% or more of all carbon neutral Apple Watch products are shipped without airplanes.º Apple Watch Trail Loop Material: Titanium, Nylon, 100% recycled polyester, 100% recycled spandex