Abstract: A sandwich composite material for use in an insulated shipping container includes two different central (core) materials sandwiched between an inner and an outer skin material. The core contains a low density, high compressive strength cellular material and a low density, low thermal conductivity insulation fabric material. The inner and outer skin layers increase the overall flexural rigidity of the composite material. The sandwich composite material can be made into flat sheets of required size and integrated into a fabric sleeve to form the container. Alternatively, the sandwich composite material can be molded as the container to achieve uniform and continuous insulation and structural support.