Did you attend any events related to National Police Week this year?
Soft body armor ballistic vest packages are rated levels 1 through 4 by the National Institute of Justice (NIJ) based on how much protection from ballistic rounds they are rated to provide. Similarly, armor plates are available in two different types or classes tested and recognized by the NIJ: type 3 and type 4.
The National Institute for Justice produced this video covering testing procedures and the importance of officers wearing their ballistic vests. Source: NIJ