Abstract: A protective brim guard for a hard hat is provided which has an enclosed elastic band with an outer bead section and a skirt extending inward from the bead section. The bead section has a circular configuration forming an internal chamber which communicates with the outside atmosphere via a channel leading to the chamber. The internal chamber and channel allows the bead section to be expanded and contracted for mounting over a hard hat brim. The skirt defines an interior planar surface which is adapted to engage the exterior surface of a hard hat when the brim guard is mounted to the hard hat.