Two steps to your brightest smile yet. The Whitening Duo combines our V34 Colour Corrector Serum and PAP+ Whitening Strips for both an instant and long-lasting whitening effect. V34 uses colour correcting technology to neutralise yellow tones and give an immediate brightening boost, while PAP+ Strips work more gradually to whiten beneath the surface — no peroxide, no sensitivity. Use together for the ultimate non-invasive whitening routine.