Yonex Cyberstar Nanospeed i Hybrid. The Cyberstar Nanospeed multi-material irons are equipped with Elastomer, a rubber-like material, which is sandwiched between two graphite plates behind an ultra-thin stainless steel face. The combination of graphite and Elastomer increases the repulsion power ("spring like face") at impact without sacrificing feel and workability. Designed to replace the long irons (#3-#5) feature a hollow head design to produce a high launch/distance iron with ultimate distance and forgiveness on off-centre hits and a more consistent trajectory.