Unverified80% confidenceTradeoffTime unknown
含2%-5%氨纶的弹力衬衫贴身舒适易活动，但纯棉爱好者需注意：氨纶超过5%会明显减少透气性且水洗后弹力衰减快，2年左右易变形松垮
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80%
Confidence
Long-term
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Unverified含氨纶/弹力纤维（如5%氨纶）的T恤更贴身修身但透气性下降且长期洗涤后弹力衰减；100%纯棉更透气挺括但易皱、缩水率更高89% similarUnverified纯棉T恤缩水率通常3-5%，标注「预缩处理/水洗棉」的可控制在2%以内；未预缩的纯棉买大一码，或加入5-10%涤纶/氨纶混纺可显著降低缩水变形87% similarUnverified弹力比例越高越舒适贴身，但含棉量下降、透气性变差且易松垮；日常穿着选棉98%+氨纶2%的组合，兼顾弹性与挺括度86% similarUnverified含氨纶（弹力纤维）5%-8%的棉质背心弹性与保形平衡最佳；氨纶超过10%虽更贴身但反复水洗后弹力衰减快，一年内易松弛85% similarUnverified锦纶(尼龙)含量70%以上+氨纶18-25%的面料弹性回复力强不易松垮；棉含量高的塑形裤塑形力3-5次穿洗后明显衰减85% similar
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