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.
40mm: Strap fits 130–190mm wrists.
44mm: Strap fits 145–220mm wrists.
You can match this strap with any Apple Watch Series 4 case of the same size. It also works with all previous versions of Apple Watch, including Apple Watch Series 3. The 40mm strap works with the 38mm case; the 44mm strap works with the 42mm case.