You level up and you get apparel keys, that you use to open apparel chests that give you random items.
If you get a duplicate you are instead rewarded with "textiles". Once you have enough textiles you can go in the apparel list and buy the outfits you want to have.
Not all gear can be bought with textiles, but most can.
Anyway I don't think a Cleaners outfit even exists: only Outcasts, True Sons, and Hyenas have an outfit.
Originally Posted by desrocchi Go to original post
Yes, i know that, but how can i get colors for my Backpack and Armor i use? There are Green/Red/Blue and much more. How can i get there more?
They are rewarded for various activities, such as killing hunters, finding hanging crates around the world, completing outfits... if you are interested in a particular color you can search how to obtain it on google, otherwise just generally playing the game you will a little at a time collect them.