The Boucle Trail, ultra-fine and lightweight, is made of soft-touch woven nylon with increased elasticity to provide maximum comfort. Thanks to a convenient tab that allows quick adjustment, the strap fits your wrist perfectly. This strap is carbon neutral. The Boucle Trail contains 30% recycled content by total weight, 100% of the electricity used for its production comes from clean sources, and at least 50% of all carbon-neutral Apple Watches are shipped via non-air transport methods.