I strongly urge people to join the Railroad and work through several of their quests until Tinker Tom unlocks the ballistic weave perk. It allows you to mod things other than your vault jumpsuit- tuxedo, military fatigues, army fatigues, etc. Your under armor. With armorer perk at 4, I was able to upgrade my military fatigues to 115 ballistic damage resistance and 115 energy weapon resistance. Pretty. Bad. frooty booty.