Your smile not only reflects your happiness, but your health. Make sure it radiates with Professional Whitening Floss from Supersmile. Calprox, a proprietary form of calcium-peroxide, works to whiten the hard-to-reach spots between teeth and baking soda freshens breath and benefits healthy gums. This floss is paraben-free. Dermstore has partnered with Flex to allow you to use your Health Savings Account (HSA) or Flexible Spending Account (FSA). This means you can now use your HSA or FSA debit card to buy Supersmile products with pre-tax dollars, resulting in net savings of 30-40%, depending on your tax bracket. Eligible for HSA/FSA with a letter of medical necessity at checkout. From dermatologist-recommended treatments to solutions for chronic skin conditions like acne, eczema, and rosacea, these products are both effective and eligible. | Supersmile Professional Whitening Floss | Dermstore