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 Regular Bands fits 145-220mm wrists and are compatible with 42mm, 44mm, and 45mm Apple Watch Models Used for one week, just prefer the silicone kind. No flaws or stains. This is the Apple brand.