eCosmetics is an authorized retailer of Supersmile.One perfect smile, coming right up! When your smile deserves it all (plus a little extra), reach for our professional extra whitening accelerator, which has all the same benefits as our professional whitening accelerator, with boosted whitening power for a dramatically whiter smile. Shown to whiten 2 shades after just ONE brushing!**Only when used with professional extra whitening toothpaste. Size:2.5oz