The JPX ONE Hybrids apply the same cutting-edge technology to a compact, iron-replacement shape. Quick Switch Adaptor : 4 degrees of loft adjustability to fine tune trajectory and look. Waffle Crown : Ultralight waffle pattern created inside the crown provides discretionary weight to be used for launch optimization. CORTECH Chamber: THE MISSING PIECE: Mizuno's CORTECH Chamber encases a dense stainless steel weight with elastomeric TPU, taking stress from the club face and creating an additional energy source. At the same time, locating weight closer to the club face to reduce spin rates, while contributing to a more solid, powerful sensation at impact. MAS1C Maraging Face: Delivers greater energy transfer and faster ball speeds across the clubface