2 yards of cotton quilting fabric
2 yards of PUL (the waterproof material used in cloth diapers)
2 packages of biased tape
A borrowed hairdressing cape.
You want to cut the cape from both the cotton fabric and the PUL and then lay them on top of each other. I chose to leave the shiny side of the PUL facing out in the back, but you can face it the other way too if you want. Next, pin the two pieces together and add your bias tape!
Add some bits of velcro (or snaps) to the neck so it can be attached, and you're done!