This antiperspirant passed the test today. I was in a broken-down car on a rural road in Alabama today. In 95 degree heat. For 90 minutes. Hot as I got, this antiperspirant held me together. My underarms still smell shower-fresh. As this is my regular daily antiperspirant, I can tell you it has held up in court, in my office when the a/c goes out, driving my truck with no a/c, under synthetic fabrics...and I never fear wearing sleeveless or strapless with this product.