Like people, not all Marathons are the same.
There are important differences depending on climate, turns, ground and elevation. What it comes down to is that every marathon race is its’ own experience, and all are not equally fast.
It is the same with running shoes, all are not equally fast. As far as we know, Airia One, our shoe is the fastest running shoe ever made. Just like the Berlin Marathon is the current fastest Marathon
Below you can calculate how much faster you might run with Airia One or click here to learn more.