The Round Lab Birch Juice Moisturizing Sun Cream SPF50+ PA++++ is a chemical sunscreen that offers protection against both UVA- and UVB rays. Since this sunscreen is rich in hyaluronic acid, it also doubles as a moisturizer.  One of the most important factors of aging and the development of hyperpigmentation and melasma is (excessive) exposure of the sun. We seperate three kinds of uv rays: UVA (UVA1 has a reach off 340-400 naometer and UVA2 has a reach of 320 en 340 nanometer), UVB (320-280 nm) and UVC (280-100 nm). UVC is blocked by the ozon layer, so we aren't exposed to rays under 280 nm.  Birch Tree Sap nourishes skin by decreasing inflammation, purifies and hydrates with its extensive minerals, enzymes, proteins and antioxidants. Amino acids, minerals and Birch Sap vitamins form a moisture-packed barrier to protect skin from drying and prevent loss of hydration. A hydrating sunscreen that does double duty as a moisturizer, for all skin types. ACTIVE INGREDIENTS Niacinamide decreases hyperpigmentation and lightens skin. Also, it helps ease redness from eczema, acne, and other inflammation. Betula Platyphylla Japonica Juice(1,425ppm) has a special ability to reduce inflammation, purifies, and hydrates skin with 17 amino acids, minerals, antioxidants, and vitamins. Hyaluronic Acid creates hydration and leads to plumper and smoother skin. UV Filters: Uvinal A plus (320-400 nm), Uvinul T 150 (280-320nm), Tinosorb-M (280-400 nm), Iscotrizinol (UVA2-UVB). Size: 1.69 fl.oz / 50ml