Hello Sunday's The One That's a Serum SPF 45 provides broad-spectrum protection. This fast-absorbing serum shields skin from UVA/UVB rays, infrared radiation, blue light, and pollution. Suitable for all skin types, including sensitive skin, the formula contains hyaluronic acid and gluconolactone. It effectively hydrates and strengthens the skin barrier, promoting smooth, radiant skin. Use alone or mix drops with your daily moisturizer.