Here we have a bunch of black polyethylene foam insulation from Seattle Theatre Group! A very versatile, strong and flexible insulation material in a few sizes and thicknesses, at least 100 square feet. Looking to pack some shipping crates or sensitive material boxes? Some microphone cases? Maybe you're building an amplifier or sound proofing your practice space? Use it for insulation or underlay! At your own risk if you're using it for a flotation device.