MySmile Prefilled Teeth Whitening Trays are crafted with a unique material that fuses with a powerful 12% hydrogen peroxide formula, perfectly balanced to be both highly effective without sensitivity, tooth enamel-friendly, these trays not only offer remarkable convenience but also deliver lightning-fast whitening results. Don't spend hours at the dentist. Regain your youthful, stain-free smile in the comfort of your home, for a fraction of the expense.