Urban rain isn't pure, it’s an acidic mix of soot and chemicals. We consult dermatologists to explain why a single romantic walk in the rain can cause chemical burns or persistent rashes, and why a 3-minute rinse can save your skin

The Food and Drug Administration says the ingredient, bemotrizinol, met the agency's standards for protecting from dangerous ultraviolet rays while causing little irritation or absorption into the skin. The ingredient is safe for adults and children 6 months and older