It might look complicated, but basically if you can use scissors and a sewing machine and have a bit of confidence time, you can make this costume!
Step 1: Materials
-polar fleece, different amount depending on the size (I got 4 yards and ended up using only about 3)
-zipper or velcro
-baggy pants, baggy shirt and hood to use for a pattern (don't worry, you don't have to cut them up!)
-sewing machine (you could do this by hand if you have all the time in the world)
-thick paper, in gold if you can find it
-small amount of dark colored fabric