It provides a Damage Threshold of 18 and can be repaired with either of the Sierra Madre armors. It provides the highest damage threshold of any light armor in the game. It is very similar to Vault security armor but instead of blue and black, it's orange and black and it has armor plates on the shoulders, knees and elbows, and its helmet is a noticeably different design. It also has "SECURITY" written on the back instead of a Vault number. It also looks similar to the Sierra Madre armor, but with dark brown stripes running down the inside of the legs and chest.
One is found in a locker in the central personnel office on the 2nd floor of the Sierra Madre Casino & Resort, and a reinforced helmet is located on a desk in the western security office with the security chief's desk.
Christine Royce will have acquired a suit (but not the helmet) after entering the Sierra Madre Casino & Resort.
This armor is the most protective piece of light armor in Fallout: New Vegas.
On the back of the armor a faint outline of 101 can be seen. This is most likely because this is a retexture of Vault 101 security armor.
When a Stealth Boy is used in conjunction with this apparel, the imprint "SECURITY" on the back will appear as "101". This is because the armor's normal texture, while a separate file, is visually identical to that of Vault 101 security armor from Fallout 3. [verified]