jane iredale D2O Hydration Spray Refill features a hydrogen molecule that is twice the weight of the molecule in ordinary water, which makes D2O 10% heavier than H2O. It can be used to set minerals after makeup has been applied or hydrate skin, especially in dry climates. In addition, those with oily skin can use this facial spray in lieu of a traditional moisturizer. The skin becomes extremely hydrated, supple and fresh. D2O is also ideal for laser patients, particularly during dry, flaky periods. This refill bottle is designed to replenish your D2O Hydration Spray bottle. 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 jane iredale 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. | jane iredale D2O Hydration Spray Refill Moisturizer, 9. 5 fl. oz | Dermstore