The ultra-thin, lightweight trail loop is made from a nylon weave creating a soft strap with increased elasticity for a comfortable fit. The strap is infinitely adjustable with a convenient pull tab for quick adjustments on the go. This strap 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 aeroplanes. Features compatible with : apple watch ultra/ultra 2 size : 49mm fits wrist : 145-220mm