Technology: The new iWhite Instant formula is clinically proven to be safe and instantly effective. The product is based on a unique FCC (Filmo-crystallized Calcium)- technology which provides an instant whitening effect, actively removes stains and strengthens the teeth at the same time. The white, bio-active crystals used in combination with strong film forming polymeric agents will physically fix the crystals on the targeted teeth surface, which will lead to an optical whitening effect. This FCC-technology is reinforced by an innovative non-hydrogen peroxide teeth whitening novelty: P.A.P. This is a strong stain-removing molecule that breaks down discolorations on the teeth in little pieces without affecting the teeth structure.The whitening trays are manufactured with soft transparent material to improve the flexibility of the mouthpiece and are designed to whiten both the front and the back of the teeth. This is important because teeth are translucent and stains on the back can show through the front. Features: Clinically proven INSTANT whitening results; Fast: up to 8 shades whiter in only 20 minutes a day; Active stain remover; Strengthens the teeth; Easy: one step system, prefilled, no mixing; Comfortable: soft transparent trays for a custom fit teeth whitening, one-size-fits-all; Whitens the front and the back of the teeth. Content: 10 prefilled, ready-to-use iWhite Instant whitening trays.