Very safe. Hyaluronic acid has the function of locking water and rejuvenating skin. However, the brand of hyaluronic acid mask products is quite confusing. Only a few brands have related hyaluronic acid products, and a considerable part of them are medical, which is rare in the market. It is suggested that you must find out the manufacturer of the product before buying such products. Nowadays, all skin hydrating products have hydrating and rejuvenating effects, so you can learn from them.