The bridge between the frontside and backside, the KORE 87 offers performance in a lightweight package. HEAD's weight-saving focus does not mean soft. HEAD fuses light Graphene into the KORE 87's tip and tail for even weight distribution. Light but stiff Karuba wood in the core is sandwiched by a triaxle weave carbon layer adding responsiveness. A sandwich sidewall construction, vibration absorption properties underfoot and a new topsheet shape round out the KORE 87's ability to charge or cruise.