What makes a look alternative? Just ask yourself: do you see the day to day average person wearing this? No? Does it catch your eye for being different? Yes? Then it is likely alternative fashion! This category is massive.
Think you don't know what qualifies as alternative fashion? I'm here to tell you that you do! Every time you notice someone's outfit being unique and different, you have identified alternative fashion. As said in the title, this is a massive category with an infinite amount of subcategories....
