He is the first man in the world to swim a big river (Danube in 2017) without a protective suit or other equipment, 89 days. He is a member of the 24 Hours Club, swimming in 2020, 36 h 29 min, 103.8 km, down the Danube. In 2021 he managed the impossible: UPSTREAM DANUBE SWIM, 26 KM, 18 h 30 min.