Overview Made from a custom high-performance fluoroelastomer with compression-molded perforations for breathability the Nike Sport Band is durable and strong yet surprisingly soft. The smooth dense material drapes elegantly across your wrist and feels comfortable next to your skin. An innovative pin-and-tuck closure ensures a clean fit. Key Features Product Material : Fluoroelastomer Compatible: Apple Watch 45mm Band clasp type: Pin and tuck Strap size: fits 140–210mm wrists and are compatible with 42mm 44mm 45mm and 49mm Apple Watch Models Dimensions: 11.5 x 2.91 x 0.47 inches