Stretches & molds to custom fit. Strong grip, no slip. Our whitest white - like a $500 professional treatment (vs. Lasers). Dental whitening kit. Enamel safe. 28 strips: 14 treatments (Each with 1 upper/1 lower). Flexfit technology allows the Whitestrip to stretch, cover, and formfit around your unique smile. It also provides a strong grip for a comfortable no slip, whitening experience. Satisfaction Guaranteed: Crest 3D White Whitestrips provide you with a beautiful, whiter smile - guaranteed. To learn more about Crest 3D White or get special offers, go to 3DWhite.com. Patents: www.pg.com/patents. Visit www.3DWhite.com.