Impact Racing 13100903 Acc - Shield, Champ/Nitro/Cycl, Dk Smk. Manufactured from the highest grade, UV-stabilized optical quality polycarbonate material available, Impact’s helmet shields feature superior dimensional stability, high temperature resistance, outstanding impact strength, and exceptional clarity for the ultimate in visual acuity. Available in various anti-fog and tinted options, Impact has a shield to suit your needs!