Add volume and texture to your fine, flat hair with L'Oréal Professionnel Série Expert Spray Volumetry. This lightweight, invisible volumizing spray is enriched with Intra-Cylane, a patented molecule that penetrates the hair fiber to create a strong internal structure. This gives your hair instant body and volume, while leaving it soft and silky. The spray is also humidity-resistant, meaning your style will stay voluminous all day long.