For this glitch, you need: a mask that has a hat, glasses and face bandana, such as:
Electric Skull Face Bandana
Yellow Face Bandana
Paisly Face Bandana
and others with ''Face Bandana'' in the end of them.

After you got your mask of choice, then go to any gunstore and equip it (Inventory > Accessories > Masks and then choose the mask.)

Ok, so you are in the gunstore with your mask equipped. Press escape or any button that brings up the menu. Then, press Online, go to Jobs > Play Jobs > Rockstar Created > A Titan of A job and launch it.

Once you have launched it and are in the mission, you should see that you no longer have a hat or glasses, but only your bandana on your head. Now, go to the gunstore if you didn't spawn in there, and go save your outfit. Double check if you got the outfit saved by going Inventory > Accessories > Outfits and choosing your outfit.

If there still isn't a hat and glasses, then this has worked. If there is, you have done something wrong. Restart and do it again, but it works most of the time.

Yes! We did it! We have no hat or glasses and only our cool bandana!
Now you can show off and act as a gangster or a criminal and look cool while doing it!
This works for the latest patch, but i'm not sure if it will stay forever, so do this before you can't anymore!

PS: This only changes your appearance, nothing else.

Enjoy your bandana! :)

~Setka8