L'Oréal Professionnel Série Expert Liss Unlimited Smoother Serum is the best way to prepare or finish up styling in straight hair types. This leave-in serum will help to not only keep the hair straight but also prevent frizz and flyaways. The replenishing formula contains smoothing agents that will leave hair soft and manageable. Moreover, it will also create a long-lasting anti-humidity shield that will keep the hair disciplined and frizz-free. This anti-frizz effect can last up to four days.

Formulated with Evening Primrose oil, full of omega-6 fatty acids, this leave-in is also able to nourish the hair and help it retain moisture and grow stronger. Lastly, when used before styling on freshly cleansed hair, this serum will facilitate both brushing and blow-drying. Alternatively, when used on dry hair, it will refresh the anti-frizz protection.