Physical SPF, or physical sunscreen, utilizes mineral ingredients like zinc oxide and titanium dioxide to create a physical barrier that reflects and blocks UV rays from penetrating the skin. These sunscreens offer broad-spectrum protection against UVA and UVB rays. They're often gentle on sensitive skin and suitable for various skin types. Applying physical SPF with at least SPF 30 shields skin from sunburn, premature aging, and reduces the risk of skin cancer.