I just adore these masks. After my first, impulsive, purchase of them, I went on to buy 2 more boxes the next time a good discount was on. Pros: Utterly hydrating. The next morning my skin feels plump and strong. There is loads of serum in the sachet, and l rub that in to my decollete as well as face. I have used it in the bath, but for maximum comfort, keep in the fridge. It just feels divine. Great for helping heal when you know your skin barrier is slightly compromised. Cons. As with all single use products, the packaging. The sachet is plastic, and I would really love to see a reusable mask sold with glass / recyclable refills of the serum. Overall, highly recommended.