Smile Direct Club's Fast-Dissolving Whitening Strips make all your worries about strips disappear. These convenient, easy, and safe strips are designed for busy people who want results fast and without the messiness of traditional (non-dissolving) strips. They’re also ideal for those who like whitening but suffer from painful sensitivity caused by other longer wear strips. And they can even be worn at bedtime while sleeping. Fast-dissolving Whitening Strips have a short wear time – just once a day for about 15-20 minutes (until the strip fully dissolves). This is 2x faster than the leading White strip. Over the course of 1 complete treatment (7 days), these strips can whiten teeth up to 9 shades. Fast-dissolving Whitening Strips are so easy and convenient, you just set ‘em and forget ‘em. There's no timer to set. No messy strip removal. Simply whiten once a day anywhere, anytime – even while you sleep. These ultra-convenient strips safely dissolve in about 15 minutes and leave your teeth up to 9 shades whiter in 1 week.1 At last, a fast, easy, safe whitening solution is now available in a dissolving strip. Fast-dissolving Whitening Strips are available in 2 pack sizes – 1 complete treatment and 2 complete treatments. Both sizes come with 4 bonus strips to touch-up your whitening whenever you like.