Including an internal insulated lining in expanded polystyrene and an external layer of packaging in hydrophobic cardboard the Thermo Box system is designed and certified for the transport of category B biological materials. The internal lining includes pockets for inserting and lodging eutectic plates (cold blocks), as well as for the temperature recorder. A pre-cut opening on the lid enables a temperature recorder to be installed, with a probe immersed in carbonic ice. These packs comply with ADR (European agreement on the international transportation of dangerous goods by road) and IATA dangerous goods regulations.