Beauty Garage Botoliss Smooth Shield Hair Serum is expertly formulated with dimethicone and cyclopentasiloxane, which work together to create a protective coating on the surface of the hair shaft. This protective layer effectively shields hair from environmental stressors, such as UV radiation (UVA and UVB rays) and air pollution. It also fights frizz and makes the hair shaft silky. The addition of argan oil and macadamia oil provides further benefits, such as promoting smoothness, shine, and overall hair health.