Unverified90% confidenceDecision RuleTime unknown
选购机洗牛仔裤优先看是否标注'预缩处理'(Pre-shrunk/Sanforized防缩)，未经预缩的100%纯棉牛仔裤首次机洗缩水率可达5-10%，建议买大一码；已预缩面料缩水率通常控制在1-3%
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Unverified原色（生丹宁/raw denim）牛仔裤需前3-6个月尽量少洗以养出个人色落，但缩水率高达5-10%，新裤建议买大一码并首次干洗或冷水手洗86% similarUnverified机洗友好牛仔裤含2-3%氨纶(弹力)最佳：既能保持版型贴合又耐反复机洗；氨纶含量超过5%虽更贴身，但多次高温机洗后弹力纤维易疲劳，出现膝盖鼓包和裤腰变松83% similarUnverified买弹力牛仔裤应选试穿时「略微服帖但不勒」的尺码，因含氨纶款穿着后会横向拉伸约1个尺码，买太松几次后会明显垮档；纯棉款则相反需预留缩水余量80% similarUnverified亲子裤日常高频穿洗建议选支数40S以上精梳棉或棉涤混纺（涤纶占比30%-40%），耐磨抗起球且缩水率＜3%，纯棉低支数款反复水洗易变形起球80% similar
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