Protis 3D Formula Teeth Whitening Kit makes each individual available to customize their own tooth tray and fit different shapes of teeth, even teeth irregularity. Dental-recommended whitening formula are applied to the product and gradually release to make the best whitening efficiency without teeth irritation.
Tested by Taiwan National University, using Protis Teeth Whitening Strips in 7 consecutive days averagely whitens teeth with 10.4 shades.
