Instant Effects Lash and Brow Volumiser 7ml is a highly advanced clear serum that's clinically proven to add volume to your lashes and brows in just 2 minutes. Continued use over 14 days increases thickness by 40% and length by 20%. The OX2 technology thickens the lash and brow line by boosting oxygen production into your hairs, this also helps promote stronger and regular hair regrowth when the bulb is still intact.