Each box contains 5 sheets of 18″ X 31.5″ of 8mm thermal insulator with Sound Dampening material, giving you 20 sq ft.
From Restomod Air: “Membrane Max focuses on Thermal Protection for ultimate heat insulation, (added sound deadening properties also). Basically, insulating the interior of vehicles. Clearly, we are a manufacturer of air conditioning systems, kits, and parts, but we noticed that most custom car builders thought the “sound dampening” material they were using also blocked out the heat. Don’t just hush it, block it!
We know that vehicles need to be insulated for air conditioning systems to operate efficiently, therefore we designed our own thermal firewall and roof insulation material to handle the issue, simply because there is no product offered, until now.”