Powder sunscreen relies on active mineral ingredients like zinc oxide to provide broad-spectrum UV protection. Unlike chemical sunscreens that absorb UV rays, zinc oxide is widely believed by experts to act as a physical barrier, sitting on the skin’s surface to reflect and scatter both UVA and UVB rays. This approach minimizes irritation, making it a great option for sensitive skin. The powder formulation is typically applied with a built-in brush or puff, ensuring even coverage without the need for rubbing or spreading.