History repeats
From memory I do believe you (el reg) posted a similar article about a t-shirt made from silver woven thread circa 2009 where the t shirt was useful for “whiffy people” and had a side effect of cooling due to the silver fibres dissipating the heat. I’ve had a quick look and can only find this from a couple of years later where the same material was applied to underwear. I shall keep looking and dig it out!
https://www.theregister.co.uk/2011/04/14/us_marines_british_underpants/