A tech-savvy skirt-chaser fitted his boots with cameras and victimized women as they walked through Union Square Park, cops said yesterday.

Eric Pierson, 43, from Brooklyn, was seen walking behind women near East 15th Street.

He was carrying a viewer, which was connected by wires through his pockets to tiny cameras lodged in the tongues of his boots, cops said.

Police moved in on him on Sept. 2 and found recordings showing the legs and underwear of another eight victims, authorities said.

Pierson was arrested and charged with unlawful surveillance.