Unverified80% confidenceDecision RuleTime unknown
防晒衣的防晒效力来自面料本身编织密度与后整理，湿水后UPF会显著下降（棉类尤甚），涉水/大量出汗场景应选涤纶或含氨纶的针织速干防晒衣而非纯棉款
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80%
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Long-term
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Unverified面料防晒能力看织物密度而非厚度：深色+高密度机织涤纶/锦纶防晒优于浅色棉麻，纯棉未经处理仅UPF5-10，湿水后防护力还会下降89% similarUnverified涤纶（聚酯纤维）防晒头套本身防晒好但吸汗差易闷，锦纶（尼龙）+氨纶混纺弹性和排汗更优，纯棉款绝对不要买，吸汗后紧贴皮肤且湿透后UPF骤降88% similarUnverified防晒面料的防护力主要来自织物密度和纤维本身，多数原纱型防晒衣的UPF值经反复水洗后衰减较小，但涂层型（后整理助剂）水洗20-30次后防护力可能明显下降88% similarUnverified涤纶/锦纶材质本身防晒优于纯棉，且速干易洗；纯棉防晒服虽亲肤但遇汗易湿重不干、防晒力弱，户外/多汗人群应选涤锦混纺88% similarUnverified涤纶(聚酯纤维)本身防晒性优于棉、麻，且吸湿快干；纯棉袖套虽亲肤但湿水后防晒力和凉感均下降，长时间户外不推荐纯棉87% similar
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