SkinCeuticals Physical Fusion UV Defense SPF 50 is a groundbreaking, weightless, 100% physical sunscreen provides water-resistant broad-spectrum protection with titanium dioxide and zinc oxide (Z-Cote*). Enhanced with artemia salina, a plankton extract, this lightweight sunscreen increases skin defenses and resistance to UV and heat stress.** Color-infused technology enhances natural skin tone and boosts daily radiance. *Z-COTE HP-1 is a Registered Trademark of BASF **based on in-vitro testing.