Courser Uniform from Best Armor in Fallout 4
The Courser uniform is worn by Institute Coursers. It provides a Damage Resistance of 30, Energy Resistance of 15 and a Rad Resistance of 15. It is not possible to wear armor pieces over the uniform. The uniform also has a bonus +1 Perception and +1 Endurance. It can be upgraded with high defensive stats using the ballistic weave upgrades learned from Tinker Tom after completing some Railroad missions.