Butterfly Roundell rubber is a great offensive rubber, with more spin than Bryce Speed and nearly the same speed as Tenergy 05. Roundell is perfect for the beginner to intermediate player interested in trying High Tension rubber, giving one consistent reaction and controlled performance. Roundell provides a fresh glue feel and sound when contacting the ball, due to the very flexible top sheet and sponge. This Butterfly rubber is geared towards an aggressive offensive player looking for consistency and controlled performance. Surface: Inverted Speed: 12.8 Spin: 10.2 Density: 32 To get the most out of your rubber, it is recommended that you clean it after each use and store it properly. Using our Racket Care Kit, use one pump of the Spin Refresh on each side of inverted rubber, then use the Rubber Care Sponge to thoroughly clean it. Once it is dry, apply your protective sheets and then place it in your case. Ideally, store your paddle in a climate-controlled space and avoid extreme temperatures for extended periods of time.