Olaplex Browbond Building Serum Eyebrows 3.5 ml is a revolutionary treatment for those who desire thicker and well-defined eyebrows. This transparent gel-serum offers una triple action: shapes, sculpts, and promotes the natural growth of eyebrows. Thanks to its formula enriched with OLAPLEX Peptide Complex Technology™ and OLAPLEX Bond Building Technology™, the serum not only keeps eyebrows in shape all day without stiffening them but also supports their natural growth cycle, helps combat hair loss, and prevents the appearance of gray hairs.