Before achieving widespread fashion acceptance, what application solidified early mass production for the fastener?

Answer

Money belts for U.S. sailors during World War I

The Hookless Fastener Company achieved major success by selling its product for money belts used by U.S. sailors during World War I, a need for security that propelled early mass production.

Before achieving widespread fashion acceptance, what application solidified early mass production for the fastener?
nameinventionfastenerzipper