This Babolat Custom Damp is made from a silicone-based material with an updated circular shape. It allows you to easily adjust the level of absorption to better fit your playing style. It helps to customize the level of racket dampening thanks to the custom damp shock absorber. One O ring can be applied to one of the dampeners for increased feel and an increased dampening effect. These Dampeners are made to decrease vibration to your racket while you're hitting the tennis ball.