This update to Wilson's legendary Sensation multifilament improves on the longstanding tradition of comfort. Wilson added metallic ribbons to the outer wrap to give players more durability and control or the already superbly comfy elastic nylon core. The new Sensation Plus should offer improvements in durability and tension maintenance. Construction: Multifilament polyamide Metallic ribbon outerwraps Colors: Red | Black Gauges: 16 G / 1.34 mm | 17 G / 1.28 mm Length: 40 ft / 12.2 m For more information on strings, see our following blog posts: Spin Friendly Alternatives to Polyester Strings Breaking Down the 4 Main Types of String Need help selecting a string? Check out our Choosing The Right Tennis String guide for more assistance.