L'Oreal Paris Prodigy 4.0 Brown is an ammonia-free permanent hair dye that offers vibrant, multi-tonal color with micro-oil technology. It provides 100% grey coverage and enhances hair texture for a natural look. Key Features Ammonia-free permanent hair color Micro-oil technology for vibrant color 100% grey coverage Enhanced with Argan oil Long-lasting color up to 8 weeks Improves hair texture Rich, multi-tonal color Easy application Micro-oil Technology, Argan Oil, Ammonia-Free Formula.L'Oréal Paris: Innovators in beauty, offering a wide range of hair color, skincare, and makeup products.Wear gloves, divide hair into sections, mix color with developer, apply from roots, leave for 20 minutes, then apply to sides for 10 minutes, rinse with warm water.For external use only, store in a cool, dry place away from direct sunlight, keep away from children, stop using the product if skin irritation or sensitivity occurs, and avoid contact with eyes. In case of contact with eyes, rinse with lukewarm water immediately.