Certain Dri Extra Strength Roll-On is a clinical-strength antiperspirant designed to provide long-lasting protection against excessive underarm sweating and odor. Formulated with 12% aluminum chloride, it helps reduce perspiration at the source while being gentler on sensitive skin than prescription-strength formulas. The fast-drying roll-on delivers up to 72 hours of sweat protection, making it ideal for people with moderate to heavy sweating who need reliable, long-lasting dryness and confidence. It is best applied to clean, completely dry underarms, preferably at night, for maximum effectiveness.