The theme for Burning Man
this year is Metropolis. This can only mean one thing1
: you need a Superman cape.
Fortunately you can find everything you need to make not just one but 4 capes by hitting up a thrift store or rummaging through your costume box.
I put together the rest of my costume for less than $10, all from items you can find in your local department store. For a full breakdown of how I did it, check out my blog
1: Actually, it means many, many things. You can find out more here