OLAPLEX No.4D Clean Volume Detox Dry Shampoo is an innovative, volumizing style extender with ingredients that support a healthy scalp. It's a dry shampoo, the OLAPLEX way. No.4D Clean Volume Detox is a dry cleansing formula with skincare science-inspired ingredients to detoxify and maintain scalp health between washes. After all, the scalp is skin too and the root of clean, healthy hair is a clean, healthy scalp. Cleanse. Repair. Detox. Key benefits: - Detoxifying and soothing to cleanse, calm and maintain a healthy scalp. - No-buildup oil absorption for a just-washed clean hair feeling. To use: Shake well before using. Separate hair into sections. Hold the bottle 6-10" away from hair and spray onto roots. Wait 30 seconds and massage into the scalp. OLAPLEX products are thoroughly tested in-house and by independent third-party laboratories for safety and efficacy. This product testing includes the industry standard Human Repeat Insult Patch Test (HRIPT), which tests for skin irritatio