Apple Watch 40mm [Purple Fog] Sport LoopSoft, 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. Band Size [40 mm 42 mm case]One Size (Fits Most)Band fits 130 to 200 millimetre wrists. Works with most versions of Apple Watch. CompatibilityYou can match most bands with any Apple Watch Series 3 or later case of