The Apple Watch Sport Loop band is woven from nylon thread to create a hook-and-loop closure. They were available for the 38/40mm and 42/44mm Apple Watch models, and were offered in sizes to fit 130–190mm wrists.
The Apple Watch Sport Loop band has been available in several styles, including (PRODUCT)RED, Spicy Orange, Nectarine, Electric Pink, Hibiscus, Hot Pink, Pink Sand, Flash Light, Flash, Marine Green, Tahoe Blue, Cape Cod Blue, Midnight Blue, Indigo, Dark Olive, Storm Gray, Black, and Seashell.
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.”
This Cape Cod Blue Sport Loop has an overall bright bright blue appearance, but is comprised of a bright blue base color with light blue and dark blue accents. This example also includes unboxing photos, and the internal packaging includes installation instructions.
Source: Apple