iWhite Instant Teeth Whitening Express KitiWhite Express is a revolutionary, dental safe teeth whitening device with immediate results. The ultra-thin sponge structure has a great absorption capacity and easily removes stubborn stains and dental plaque in hard-to-reach tooth surface areas.The efficacy of the iWhite Express is based on two elements; the stain eraser sponge and the teeth whitening serum. The stain eraser sponge has to be activated with a few drops of the iWhite Express teeth whitening serum which contains natural whitening enzymes, enamel strengthening actives and cooling agents for a fresh-breath sensation. The combination of the stain eraser sponge and whitening serum:Erases stains in hard-to-reach surface areasRemoves stubborn teeth stains and plaque. On average 88% stains are removed within 1 minute/60 seconds*Powerful teeth whitening serum: activates, whitens, strengthens & freshens * Stain removal percentage based on the change of the biometrical delta E value (In vitro evaluation of iWhite Express for stain removal and whitening effect versus a positive control).