Apple 40mm Sport Loop - Strap for smart watch - Regular size - vitamin C - for Watch (38 mm, 40 mm, 41 mm). 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.