The Fengea Teeth Whitening Kit includes 4 moldable whitening trays and 2 ventilated storage cases, designed for safe, effective, and comfortable whitening at home. Made of BPA-free, food-grade silicone, the trays soften in hot water and can be shaped to fit your teeth snugly. They provide long-lasting comfort for extended whitening sessions and can also be used as night guards to help protect against teeth grinding. Durable, odorless, and reusable, these thermoforming dental trays are a budget-friendly alternative to costly custom trays from the dentist, offering professional-quality results with hygiene and convenience.