Scotch Porter Smooth & Shine Serum 1.7oz. The Smooth & Shine Hair serum mixes the finest Argan and Avocado Seed Oils, leaving your hair smooth, moisturized, shiny and frizz-free. Hair Serums are good for anyone who wants to seal in the moisture that they've already added to their hair, add deliberate shine, assist in detangling, and to provide protection against heat. Cooling sophistication of natural herbaceous notes like Lavender and Bergamot coupled with Cardamom and soft Amber Woods.