Files are assigned via MP Clothes addon which can be found here:
File gotta be installed here:
Grand Theft Auto V – mods – update – x64 – dlcpacks – mpclothes – dlc.rpf – x64 – models – cdimages – mpclothes_male.rpf – mp_m_freemode_01_mp_m_clothes_01
Credits:
TripleBandz Shop