This is Male UnderArmor mod. Like short pants with sneakers. Available in three color for sneakers including Institute pants.
Credit to:
- BurlingtonBeast ( Synth white uniform ) from Nexus. This free asset uploaded by Enthusiast's Synth Uniform - Retexture :
https://www.nexusmods.com/fallout4/mods/19775
- LEWD CommonWealth Conversion
https://www.nexusmods.com/fallout4/mods/10101
Download the mod here ( I already included whole mod, so this is totally standalone ) :
MALE UNDERARMOR