Hallowe'en has come and gone, but it's always the right time for hats that make you look like your skull has been removed, exposing your brain!
It's best to study pictures of the human brain before tackling this project in order to best mimic the brain's convolution patterns when caulking the cap.
Weighing a little less than a pound and a half, this costume is still lighter than most professional bicycle and motorcycle helmets. Use a cap without an adjuster to ensure a perfect fit.