Certain Dri Prescription Strength Roll-On is prescription strength, with 12% Aluminum Chloride, and the most effective antiperspirant you can buy without a prescription. Other antiperspirants may have aluminum complexes at higher percentages – but they are not the same. Aluminum Chloride is the strongest and most effective active ingredient available in antiperspirants and is the same active ingredient in many prescription formulations. Aluminum Chloride is the #1 doctor recommended active ingredient for excessive sweating and is why Certain Dri Prescription Strength Roll-On is different from the rest Brand: Certain Dri Dimensions: height: 525 weight: 22 length: 163 width: 263 Features: Treats excessive perspiration Reduces underarm wetness null null null null null null null null null