I've grown up in California's deserts and withstood days in 100-120+ degree heat. Needless to say, deodorants and anti-perspirants are definitely a necessity here. I've tried so many different types and wasted a ton of money on some. Though, the Secret line has always managed to draw me back in again and again. I just began using the newest line which is the "Clinical Strength" version and so far so good. I even had some of my friends try it. They work as chefs at a restaurant and when they've spent countless hours behind a stove and it's still working, then it's definitely worth giving a try. I even had some of my male friends try it because they wanted to prove if it really is "Strong enough for a man..." I'm satisfied for now though I go back and forth between this and the Dove products because they make my skin feel very rich and pure.