Nike's Vomero Premium has a 55 mm stack height, the tallest in Nike's portfolio, making it "illegal" according to World Athletics regulations.
The shoe is designed for recovery and training, not for racing, with an aim to create an "anti-gravity sensation" similar to an anti-gravity treadmill.
regulators fuel innovation, and other times, they stifle it
All running shoes, despite their unique designs, are governed by the same set of World Athletics Athletic Shoe Regulations.
Author's summary: Nike's Vomero Premium defies World Athletics rules with its 55 mm stack height.