You can level up your clothes by wearing them a total of 1 day (dosent have to be a day straight it can be a day gay) and then you will be able to choose a perk out of 3 options, you may find comon, unusual and rare perks most lv, epic perks every 5th lv, and legendary perks every 10th lv (lv 5 will be an epic, lv 10 a legendary, and lv 15 an epic) List of perks coming soon™