and inner impact resistant layer 70 extend from the crown region 10 downwardly from the longitudinal axis 28 to the edge of the front region 13 and back region 12 each opposing side 14 15 extends downwardly from the crown region 10 to below the wearer 39 s ear disposed abutting and beneath the shock absorbing gel layer 80 is a carbon fiber layer 71 that extends the length of the circumference of the curve of the shell 105 carbon fiber or alternatively graphite fiber is a material consisting of fibers composed of mostly carbon atoms the carbon fibers have a high tensile strength low weight high chemical resistance high temperature tolerance and low thermal expansion carbon fibers are usually combined with other material to form a composite normally the carbon fiber is reinforced with a polymer plastic or thermoplastic other fibers can be bonded to the carbon fiber such as aramid glass or glass fibers as the inner 70 and outer impact resistant layer 21 the carbon fiber layer 71 extend from the crown region 10 downwardly from the longitudinal axis to the edge of the front region 13 and back region 12 each opposing side 14 15 extends downwardly from the crown region 10 in the illustrated embodiment a stack layer 40 lay beneath and abutting the carbon fiber layer 71 the stack layer 40.