This antiperspirant + deodorant has 20% Aluminum Zirconium Complex, which is the same active ingredient found in most other clinical antiperspirants. This active ingredient has been shown to provide all day protection for many people who seek an effective clinical antiperspirant with added deodorant protection. Directions: For maximum protection and efficacy, apply to each underarm before bed. It works while you sleep to stop sweating before it starts. It can also be reapplied in the morning for an extra layer of freshness and deodorant protection. To reduce the risk of irritation, be sure underarms are completely dry before applying.