DuraTherm Insulated Wall & Door Liner Kit for VOLKSWAGEN Crafter, Transporter, Caddy, CrafterInsulated DuraTherm These industry leading wall and door liners are highly durable, impact resistant, and will protect cargo van panels from the harshest wear and tear. The 3mm insulation layer deadens sound significantly, to enhance operator workspaces, while creating a thermal barrier to control temperatures. With a total thickness of 9mm, these liners provide superb side panel protection, to increase the lifespan and resale value of the vehicle.