Well, the stuff you find in outlet malls (as previous said) usually has flaws, like pockets sewn shut or the size on the label isn't correct... if you try something on and like it, the quality is the same because it's made from the same stuff as the regular stores get.
Also consider that stuff gets sent here when it becomes outdated. It's hard to find good clothing deals at outlet stores.
edit: Worth checking out an outlet mall if you have a day to kill.