The Apple Watch Sport Loop band was woven from nylon thread to create a hook-and-loop closure. These bands were available for the 41 mm and 45 mm Apple Watch models, and were offered in sizes to fit 130–200 mm wrists (41 mm) and 145–220 mm wrists (45 mm). The bands also fit older Apple Watch sizes.
This Tornado/Gray band used a two-stripe design first introduced in Fall 2021. One stripe was olive green and the other was a dark gray with edges in dark green. The connector and closure plastics were in a dark green color that matched the thread edges.
Apple’s use of green hues in a color named “Tornado” can be explained by science. According to Accuweather, when the sun’s “…setting light is transmitted by a massively thick cloud composed of water droplets and ice particles, the results are a green sky.”
Apple described the Apple Watch Sport Loop band:
“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. On the reverse side, the attachment loops are securely anchored for superior durability.”
Source: Apple, Accuweather