The iWhite Instant Professional Teeth Whitening Kit gives professional teeth whitening results without the need for an expensive trip to the dentist. Easy to use, the iWhite Instant formula uses FCC (Filmo-crystallized Calcium) technology, which has been clinically proven dentally safe and instantly effective in making teeth up to eight shades whiter. Each iWhite Instant Professional Teeth Whitening Kit features ten thin flexible trays. Comfortable to wear, just 20 minutes at a time over five consecutive days will produce instant and noticeable results. There is no mess and no hassle, with individually packed one-size-fits-all trays that do not need to be cleaned, boiled or sterilised. There is no need to use special gels or toothpaste.