Gladiator armor

Description
This armor is automatically equipped when you choose to destroy Mr.House's bunker at The Fort, and when fighting in the arena. It is identical to leather armor.

Although you cannot keep it after fights (unconfirmed), it is the best light armour in the game, with a 19 DT, second place is Vault 34 Security Armour, with 16 DT

It should also be noted that getting the armor out of the Fort will result in a DT of 12 and no agility bonus.

Location
Located at The Fort while fighting Benny in the arena.

You also wear it if you choose to fight in the arena in order to gain fame with Caesar's Legion.

Appearances
Gladiator Armor is only found in Fallout:New Vegas.