The OT™ Iron shafts originated in Japan in our “idea lab” called FRANKI™ named for the Japanese word for incubator – “Fooranki”. This group of designers, engineers, tour reps and other specialists spend their time and energy creating new ways of doing things. No matter how crazy they seem. The OT™ Tour Iron, OT™ Hybrid shaft doesn’t use traditional prepreg sheet, but instead uses a new material for the golf shaft industry called Tow Prepreg. Tow Prepreg uses carbon fibers that are arranged in super-strong “bundles” (the way a steel cable is made). These bundles are impregnated with resin to create the Tow Prepreg, and then woven together like a braid. The “braiding” technology using Tow Prepreg is incredibly resistant to twisting and ovaling and creates a shaft with no spine, so the shaft performs more consistently than a shaft made with traditional sheet prepreg. The braiding also minimizes vibration, to provide the better feedback that’s so important for iron play.