The Division 2 Tactical Response Police Outfit is a pre order item for the Warlords of New York DLC. By pre ordering the game you get access to the unique clothing outfit to make sure you fit right in during your time in NYC.
DIVISION 2 TACTICAL RESPONSE POLICE OUTFIT Guide
To get the tactical police response outfit in game if you have pre ordered, it is simply located in your storage box. During the DLC when you arrive at the first safe house you can equip your new outfit which also comes with a new level 40 enforcer shotgun.