As far as I know the clothes don’t prescribe a temperature to be washed at, but rather a maximum temperature threshold upto which the material can withstand wit

As far as I know the clothes don’t prescribe a temperature to be washed at, but rather a maximum temperature threshold upto which the material can withstand without risking damage to itself. So a 40°C cloth can be washed at any lower temp but might deform or loose color or even breakdown if washed warmer than that.