The Wella Blondor Freelights Developer 30 Vol. (9%) is a key part of the Blondor Freelights system, designed for natural-looking, foil-free highlights. Its Actifuse Technology blends with Blondor Freelights White Lightener to create a flexible mix for precise, freehand application. This developer offers extra lift. It's designed for more noticeable lightening and is suitable for achieving medium to higher levels of lift.