This nourishing conditioner delivers even, all-over toning, brightness, and smoothing hydration from root to tip to detangle and soften fragile blondes without weighing hair down at the roots as some conditioners can. The only purple conditioner with patented OLAPLEX Bond Building Technology™ to strengthen hair bonds for strong, healthy-looking blondes and greys. Nº^.5P is clinically proven to smooth, strengthen, and reduce brassiness after just one use.