Don't know about a particular brand, but....
...the pertinent CA Penal Code is:
12370. (a) Any person who has been convicted of a violent felony,
as defined in subdivision (c) of Section 667.5, under the laws of the
United States, the State of California, or any other state,
government, or country, who purchases, owns, or possesses body armor,
as defined by Section 942 of Title 11 of the California Code of
Regulations, except as authorized under subdivision (b), is guilty of
a felony, punishable by imprisonment in a state prison for 16
months, or two or three years.
Subdivision (b) discusses the procedure in acquiring an exemption for those with felony convictions whose job requires them to possess/wear body armor.