Fibracell material is a sophisticated composite of aerospace materials designed to precisely duplicate the way Nature constructs reed cane. Very stiff but sound absorbing Aramid fibers are suspended in a light weight resin formulation.  Precision-manufactured out of kevlar fibers which are then arranged in a resin matrix. The end result is the Fibracell Synthetic Baritone Saxophone reeds (are known for being) the first synthetic reeds to feel and play like natural cane.