An emergency anti-hypothermia system has a thermally insulating vest that is sufficiently portable to be carried for emergency use in a pocket, purse, backpack, compartment of a vehicle, ski pole or other location, with the vest providing thermal insulation by being made with thermally insulating air impervious material that also provides for its inflation. A multiplicity of interconnected inflated chambers situated about the vest, provides thermal insulation by anti-conduction, anti-radiation and anti-convection in a highly portable system. An outer surface having radar reflective properties further improves visibility of the vest.