Custom Care™ Smooth Booster. Boost your salon smooth finish with Shield Lipid Complex ™. Enriched with 18MEA-40, designed to replenish the lipids that are lost from the cuticle through heat styling, this genius treatment seals in moisture. Infused with bamboo extract it provides anti-humidity and frizz fighting benefits. Suitable for Dry, frizzy, damaged or colour treated hair.