composite material reinforcing fibers for polymer matrix composite materials are generally known exemplary fibers include carbonaceous fibers e g carbon or graphite fibers glass fibers and other filamentary materials in an especially preferred embodiment the frame 114 is formed of a 30 glass filled polyimide composite material a pair of flexible walls or blades 115 extends from the face of the polymer frame 114 immediately adjacent the cavity 136 on opposite lateral sides thereof because the blades 115 are formed of a polymer material they can flex and can therefore be spaced apart a distance that provides a snug interference fit between the blades 115 and the sides of an attached mounting system 120 in this manner side to side movement between the mounting system 120 and the shroud assembly 110 can be eliminated this is in contrast to prior art metal shrouds which must be toleranced to provide a clearance fit between the shroud and the mounting system allowing undesirable side to side movement between the shroud and the helmet mount in addition the use of a polymer frame 114 provides a reduction of the weight of the shroud assembly 110 as compared to prior art metal shrouds in the depicted preferred embodiment the blades 115 include a.