有些“防晒衣”为何不防晒？医生：别迷信黑科技，厚度要达标

Group 1 - The core viewpoint emphasizes the importance of sun protection and highlights issues in the sunscreen clothing market, including false advertising and unverified UV protection claims [1] - The article discusses the necessity of sun protection to prevent skin aging and various skin issues, predicting that the domestic sunscreen clothing market will reach 95.8 billion by 2026, with sunscreen clothing accounting for over 50% of this market [2][3] Group 2 - When selecting sunscreen clothing, thickness is a critical factor, as effective UV blocking is achieved through physical barriers rather than relying on high-tech claims [3] - The article advises consumers to ensure that sunscreen products are legitimate by checking for manufacturer information and regulatory compliance, warning against "three-no" products [4] - It explains the differences between physical and chemical sunscreens, noting that physical sunscreens do not require frequent reapplication unless sweating, while chemical sunscreens need to be reapplied every 2 to 3 hours due to UV exposure [5]