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Copyright © 2020 Liu, Liu, Cui, Wang, Zhang and Tang.Tough gel with extreme heat threshold is a class of soft products having possible applications within the certain areas that require exceptional integrated properties under subzero heat. Herein, literally crosslinked Europium (Eu)-alginate/polyvinyl alcohol (PVA) organohydrogels that do not freeze at far below 0°C, while retention of high tension and stretchability is shown. These organohydrogels are synthesized through displaceme