Tennis Warehouse
Iso-Zorb Grommets

Iso-Zorb is an exclusive Wilson polymer similar to the material used in skyscraper foundations to absorb the shock of an earthquake. The grommets in the Hyper Hammer 2.7, 4.0 and 6.2 are engineered from this material. According to Wilson, vibration is reduced by 30% for increased playing comfort.
Wilson Iso-Zorb Grommets