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. This weave is made with 82% recycled yarn, some of which contains material from discarded fishing nets. This strap is carbon neutral. The sport loop contains 45% 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 1-9, se and watch ultra/ultra 2 size : 45mm fits wrist : 145-220mm