Unlike mylar space blankets that can easily tear, the Rescue Essentials Hypothermia Wrap is made from a combination of mylar and strong, lightweight polyethylene fabric laminated together. It provides improved body heat reflection and durability compared to traditional mylar. High visibility orange on one side and metallized silver on the other, the Rescue Essentials Hypothermia Wrap is THE lightweight, compact solution for keeping patients warm - the last critical phase of the M.A.R.C.H. treatment algorithm. Silver side can be reversed to deflect solar gain when the need to cool a patient arises. Weighing in at only 3.5 ounces, this is an essential piece of gear for all responders.