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Car Side Windows Transmit Up to 60% UVA, Experts Call for Layered Protection

With modern auto glass failing to block most UVA radiation, experts are urging layered protection through precise sunscreen use, UV-filter films, UPF clothing, UV-index monitoring.

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Overview

  • Automotive side and rear windows made from tempered glass allow as much as 60 percent of UVA rays to pass through, heightening deep skin damage and long-term cancer risk for drivers and passengers.
  • Dermatologists warn that using only half the recommended sunscreen amount reduces a product’s stated SPF by up to two thirds and stress checking expiration dates and reapplying every two hours.
  • High-UPF textiles tested under realistic conditions offer the most reliable primary defense for children’s sensitive skin, with sunscreen reserved as a secondary barrier.
  • The WHO-endorsed SunSmart Global UV app provides real-time UV-index readings and customizable alerts to ensure timely sunscreen application.
  • Experts debunk persistent myths by confirming that approved sunscreens and UV-blocking eyewear do not cause cancer and remain safe when used according to guidelines.