His police-issue boots were provided by the department.

police-issue 是由 police（警察）和 issue（发放、配发）组成的复合形容词，中间用连字符连接。 issue 在这里是名词，意思是"发放、配发"，指官方统一发放的物品。 police-issue 合起来表示"警用配发的"，用来形容由警察部门统一发放的装备或物品。