SUB-3 Challenge
World's fastest open source running shoes!
Josef was the first runner to complete the SUB-3 challenge wearing Open Run shoes, finishing at a time 2:56:20.
It is worth mentioning that this was Josef's personal record, and he did it in a shoe that he built up only 10 days prior to the race. Big KUDOS!
Josef is a 3D shoe designer, runner, and at the same time one of the first supporters of Open Footwear project.
Freiburg Marathon, Germany, 29 March 2023
