MAKE Instructable group member Radiorental made a really nice laptop bag from antistatic workbench rubber mats – “Materials are irrelevent. I wanted a slightliy durable material and opted for this 1/4″ thick antistatic workbench rubber mat. Some neoprene for the parts of the bag that will directly cover the laptop to provide some shock absorbsion and a combination velcro & tarp snap for fastning.” Nice work! Link.