Offering six benefits, the Goldwell Dualsenses Just Smooth 6 Effects Serum promises to reduce flyaways, improve manageability, lend humidity control, alongside supporting anti-static, high shine and ultra-soft results. Developed with kukui nut oil, the lightweight serum provides up to 72 hours of smoothness, making it ideal for thick, flyaway-prone strands. Doubling up as a heat protectant, apply the formula to towel-dried lengths for thermal defence up to 230°C.