SPIRAL X

This is the description.Shimano’s proprietary Spiral X technology utilizes triple layer construction consisting of an oblique fiber core layer, a longitudinal middle layer, and a reverse-oblique fiber outer layer. This unique construction increases rigidity without increasing weight, providing virtually instantaneous power transmission when casting or fighting a fish.

Spiral X construction consists of three layers: an inner and outer layer of seamless Infinity Tape tightly wound diagonally in opposite directions, and a layer of vertical fibers called Muscle Carbon in between. Utilizing Infinity Tape in place of a traditional sheet of horizontal fibers reduces overall weight and creates actions with superior torsional rigidity and hoop strength.