The teeth whitening strips help to remove teeth stains for a whiter smile to boost confidence, leaving you with a more youthful, vibrant, and attractive smile.features it can effectively remove tooth stains caused by smoking, drinking coffee and tea. Bamboo charcoal extracts for these whitening strips, which provides stronger whitening effects and reduce irritation to your teeth. Just in 30 minutes, you can achieve teeth whitening results. But can be left on for as long as 60 minutes if desired and please insist on using it will be more effective. With whitening strips have a adhesion design, once the whitening strips are applied, there's no need to concentrate on keeping them in place throughout the whitening process. The teeth whitening strips can be used daily, or at your convenience, at home or on the go, to achieve a brighter smile when desired. Expiration date from the manufacture date 2 years. Specifications material gel ingredients pvp, pap, glycerol, alcohol, water, sodium polyacrylate, ethylcellulose, xylitol, xanthan gum, pvmma copolymer, c12-15 pareth-3, potassium citrate, hydroxyapatite, rebaudioside a, sodium citrate, menthol expiration date from manufacture date 2 years teeth whitening strips color white sizelxw upper striplxw approx. 7.5x1.6cm lower striplxw approx. 6x1.6cm package contents 14 pairs of teeth whitening strips please note due to manual measurement, there might be a tolerance in the product size.