> Commercially available irons are used for ironing. In places where no electrical power supply is available or cannot be used due to humidity, the heating plate is heated by auxiliary constructions (mostly gas cookers). For the World Cup, for example, a process was developed in which the iron is heated inside by an exothermic reaction, generated by mixing a hygroscopic chemical pressed into granules with water.
"We took our own iron. It's not battery powered so it doesn't iron that well, but the quality of the ironing is not the point - it's where you do it."[1]
So it sounds like they just run a not-plugged-in regular iron over some fabric and call it ironing?
[1] https://www.theguardian.com/world/2003/apr/25/everest.nepal
This photo, for example, shows a plain old plug-in iron: https://web.archive.org/web/20161017222702/http://teamsteam....
Same guy, up in a tree, with the same iron: https://web.archive.org/web/20161017223140/http://teamsteam....
From this page: https://web.archive.org/web/20160920083532/http://teamsteam....
¯\_(ツ)_/¯
If ironing is just about extra bulk of equipment not the actual product of ironing, then it's more like weight-added competition. Otherwise there needs to be some way of judging the ironing aspect, like quality, novelty, or artistic merit, in addition to the otherwise difficulty, like in figure skating, for example.
But just for fun - everything is sport. In the line of "everything and the kitchen sink", how about extreme dish-washing!
Apparently the clothes don't need to be dry either!
[1] https://www.bluetti.com/products/bluetti-ac50s-500wh-300w-po...