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ProductMajella UnderwearSilver-fibre boxer brief with a structured cooling pouch. Lab-tested at the University of Ljubljana. ProductSilver-safe wash bags (3 pack)You’ll need these. Silver fibre shouldn’t go loose in the drum. PageThe ScienceRadiofrequency shielding, air permeability, worn temperature. Tested at the University of Ljubljana. PageMale fertilityHeat, the phone in your pocket and what underwear can and cannot do. PageAboutOur story: four friends, a New Year’s Eve conversation and two university laboratories.