Group 1 - The article emphasizes the importance of selecting effective sun protection gear, particularly focusing on the UPF rating of products [2][3][4] - For sun umbrellas, it is recommended to choose those labeled "UPF50+" for better UV protection, along with materials like polyester and black glue coatings for durability [2] - When selecting sun-protective clothing, consumers should consider the fabric density and color, with thicker and lighter colors providing better UV protection and comfort [3] Group 2 - Sun hats should also be chosen based on their UPF rating, with a minimum of UPF40 for effective sun protection, and additional features for comfort [4] - Other sun protection accessories like masks and sleeves should be evaluated for their cooling properties and UPF ratings, ensuring they meet the necessary standards for effective sun protection [4]

Group 1 - The sales of various sun protection products such as sun-protective clothing, hats, sleeves, and masks have surged since the beginning of summer [1] - Shanghai market regulatory authorities conducted tests on a batch of sun protection clothing and accessories, revealing that some products had non-compliant labels, inconsistent fiber content, and inadequate UV protection performance [2][3] - The testing results indicate a decreasing trend in the performance or quality issues of sun protection products, with a growing concern over misleading advertising by merchants [3] Group 2 - Experts suggest that while higher UPF values indicate better sun protection, consumers should not blindly pursue excessively high UPF ratings, as UPF 40+ and UPF 50+ are the only compliant labeling methods according to existing standards [4] - Research shows that when UPF exceeds 40, the UV damage to the skin is minimal, and the difference in UV blocking between UPF 500 and UPF 1000 is only 0.1%, while production costs increase significantly [4] - Consumers are advised to consider the design, breathability, cooling properties, and moisture-wicking characteristics of sun protection products, in addition to ensuring they meet relevant standards [5]