The Mare Island Naval Shipyard, located 25 miles northeast of San Francisco, California, was the first U.S. Navy Shipyard established on the Pacific Coast (1853). In April 1965, Mare Island and San Francisco merge and are renamed San Francisco Bay Naval Shipyard. With sites at Mare Island and Hunters Point, it becomes the largest Naval Shipyard in the world. The SeaVees 04/65 Off Shore Boot is inspired by the foul-weather footwear worn by the Naval Shipyard workers. Made of lightweight natural rubber, the boots are 100% water-proof, with every seam being vulcanized water tight. Other details include brushed silver eyelets, leather-lined molded footbed, fleece lining, and vintage style outsoles. Look for these now through SeaVees.