Crest Whitestrips Kit Professional-Level Effects 20 + Monthly Booster 35 Levels.

20 - Treatments (40 strips - 1 upper and 1 lower) Professional Effects

11 - Treatments (22 strips - 1 upper and 1 lower) Supreme Bright Boost

Can whiten teeth up to 35 levels

Offers professional-level whitening

Safe for enamel and effective