https://www.runnersworld.com/news/a63854861/rajpaul-pannu-skyward-x/

Apparently shoe rules became a thing in 2020.  There's a maximum stack height of 40mm.  Conceivably someone could pile up over 40mm of EVA but it would be pretty unstable.

https://www.runnersworld.com/news/a30721631/nike-vaporfly-ban/

Another rule banned prototype shoes not on the market for over 4 months. 

Wonder if that means custom shoes have to be open source & the design can't be modified less than 4 months ago.

How did they even track down Raj's shoe height or know it hasn't compressed below 40mm?  They must have reviewed the still photos & gone by the brand.  Some race proctor must be having a few laughs at the lion kingdom's still photos. 

If they bust the lion kingdom on the course, we'll just go barepaw.