Discover MrJamieStevens range of hair thickening products for men, including our thickening shampoo, conditioner & keratin hair fibres.. Born out of a need for results driven products that don’t sacrifice style, MR. is the ultimate men’s haircare system designed to help combat the challenges of thinning hair and provide everyday grooming staples to keep hair strong and healthy. MR. is the brain child of award winning hair stylist Jamie Stevens who with the help of Global experts in Research and Formulation Development Brand Architekts has created the innovative dual-action system.