Abstract: An equestrian show helmet includes an impact resistant outer helmet shell formed to cover a wearer's head. The helmet shell has an upper dome-shaped portion and a lower rim extending from a forward portion of the dome, thence rearwardly to a pair of lateral side portions of the dome, and thence further rearwardly and downwardly to a rear portion of the dome wherein the rim is at its lowest point. A brim extends forwardly from the lower rim at the forward portion of the dome. A protective inner helmet liner is mounted within the dome portion of the helmet shell. The helmet liner has an upper dome-shaped portion that nests within the helmet shell, and a lower rim located substantially proximal to and extending substantially parallel with the helmet shell lower rim. A first vent aperture is formed in the helmet shell at a central top portion of the helmet shell dome. A second vent aperture is formed in the helmet liner at a central top portion thereof which is adjacent to the first vent aperture.