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.Band Size Regular 40mm: Band fits 130–200mm wrists. 44mm: Band fits 145–220mm wrists.CompatibilityYou can match this band with any Apple Watch Series 6 case of the same size. It also works with most previous versions of Apple Watch, including Apple Watch Series 3. The 40mm band works with the 38mm case; the 44mm band works with the 42mm case.Apple Watch ModelsApple Watch Series 7Apple Watch Series 6Apple Watch SEApple Watch Series 5Apple Watch Series 4Apple Watch Series 3Apple Watch Series 2Apple Watch Series 1Apple Watch (1st generation)