That Owayo shirts say wash at 30oC on the label. Washing my YACF jerseys at 40oC for the last few years doesn't seem to have damaged them
They're pleasingly resilient, as long as you don't shoulder-barge too many canal bridges in them.
I can vouch for that, except for the barge bridge barging bit
I can't help wondering what the accuracy of the average washing machine's temperature control is anyway. But not to the point of getting covered in irritant bodging a DS18B20 past the seal. The cynic in me would guess that they run cool in order to fudge the energy consumption rating...
I would have thought a Kim solution would have been a waterproofed minion skeleton (kinder egg insert) containing battery, wireless module and temperature sensor) would have been more appropriate bodgery (corrected back from the autocorrupt's badger)
(I generally work on the principle that if it can't go in the 40C synthetics wash with everything else, then it's far too much effort.)
That is my mother's rule. If it can't go in XXX wash then you are doing it yourself. I have followed that line too.