This is the lightest jacket I have and it joined Atacama Crossing.
Because it's extremely easy, I bought the jacket because it is blank and transparent. Then I do not have to sew on the "patches" flag and number, etc.
The challenge with the jacket is that it breathes badly and in normal conditions, there is much condensation inside.
In the Atacama desert that is the driest place on earth I had calculated that condensation would not be a problem.