Please note that this seller's product is not an original, but an analogue of the original product. Functions: 1. Skin Soothing 2. Collagen Formation 3. Anti-aging 4. Acne Improvement 5. Skin Tone Improvement What is the O2toDerm ? The O2toDerm (Otoderm) , also known as Oxygen Glass Facial or Oxygen Dome Therapy, is a hyperbaric anion oxygen system. The revolutionary system turns natural air into pure oxygen of up to 92% and delivers it through the dome-shaped mask in a hyperbaric-like chamber. It generates the amount of anion ( negative anion) by 3 million more than natural production. Anions are vitamins from the air, similar to what you get in a deep forest. They induce and stabilize free radicals which in turn regenerate new cells, reduce bacteria, rebalance PH levels, improve signs of aging, correct and heal damaged cells. Effect of Oxygen: Oxygen is an essential element for our ability to breathe and our body to function optimally. It is also essential to regenerate damaged cells and decompose lactic acid. O2toDerm produces up to 92% pure oxygen, making skin respiration better, rejuvenating the skin, and achieving anti-aging results. It is improves the skin's ability to reproduce collagen to improve signs of aging. It eliminates ROS aka Reactive Oxygen Species, which is a primary source of skin aging.