They show a very satisfying video ad of dermi cool talc in which this powder is making the hot sunny day get cooled by the effect of this on the body. In addition to that they will show some models playing scientists confirming that this powder is scientifically proved to be a cooling agent and makes heat go away from body. Looking at them the ad becomes more convincing and promising.
But in reality, this powder is nothing more than a scented talcum powder. It doesn't have any cooling effect on the body. It will just feel for 2 to 3 minutes that it is cooling the temperatue but nothing happens like that.