Since the creation of the first bullet-resistant vest in the late 1800s, numerous developments have been made in the field of soft body armor. Through World War I, World War II, and the Korean War, several vests were produced for the U.S. military. In 1969, American Body Armor was founded and began to produce a patented combination of quilted nylon and multiple steel plates to be marketed for the first time to the U.S. law enforcement community. By the mid-1970s, the DuPont Corporation introduced the Kevlar synthetic fiber, which was immediately incorporated into the evaluation program led by the National Institute of Law Enforcement and Criminal Justice (known today as simply the National Institute of Justice) to analyze the possibility of creating an everyday, concealable vest.
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机译：自从1800年代末期创建第一枚防弹背心以来，在软质防弹衣领域已取得了许多发展。在第一次世界大战，第二次世界大战和朝鲜战争中，为美军生产了几件背心。 1969年，American Body Armor成立，开始生产缝尼龙和多种钢板的专利组合，首次在美国执法界销售。到1970年代中期，杜邦公司（DuPont Corporation）引入了凯夫拉尔（Kevlar）合成纤维，该纤维立即并入了由国家执法和刑事司法研究所（今天简称为国家司法研究所）领导的评估计划，以分析创造出日常，可隐藏的背心。
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