You can choose whether or not to wear any apparel, but they're still yours forever. It's not uncommon to own every piece as they are randomly dropped. Preferably boost those you decide to wear.
I've spent small fortunes upgrading apparel that I later decide I don't want. Part of the game and a money pit for coins. Good luck!
GuDGeoNaToR:
I have a bunch of apparel that I'm never going to use. Is there anyway to get rid of some of them?