These white bags are made of 2 layers of a 3 mil polyethylene film laminated to 1000 denier scrim reinforcement material (equivalent strength to 12 mil vinyl material). This material remains flexible down to -70°F. In addition, the chlorine-free polyethylene material used in this bag and our Heavy-Duty Bag does not release chlorine gas and therefore eliminates the disposal problems associated with vinyl material. Each body bag is supplied with a Body Bag Identification Tag Kit.