Paulson's Outfit

 and the matching Sheriff's Hat are pieces of clothing are added to Fallout 3 in the Mothership Zeta add-on. They are worn by Paulson.

The outfit provides a damage resistance of 5 as well as bonuses of 1 to Charisma, 10 to Small Guns and 5 to Speech. The hat has a DR of 1 and a bonus of 1 to Perception. Both cannot be repaired except by merchants.

Obtaining
Paulson's Outfit is worn by Paulson throughout Mothership Zeta, so you'll need to do a little backstabbing to get it. You can loot it off his body if he bites the bullet during the quest, or you can reverse-pickpocket it with a better suit of armor.

Appearances
and his Sheriff's Hat appear in the Mothership Zeta add-on for Fallout 3.