The Advanced Solid's H2OGuard technology provides three layers of protection: Clinically proven, waterproof wetness protection. Odor absorbing capsules that respond to heat and humidity. Skin soothing conditioners. Who would benefit from using Clinical Strength Waterproof Advanced Solid? Anyone looking for all-day protection that keeps working through heat and humidity or after being in water will love the benefits of Secret's waterproof wetness protection.