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How should shell, lining and seam construction be assessed for down leakage?
Assess down leakage using the proposed shell, lining, filling and seam construction together. Review migration through the fabric and stitch lines under agreed handling and care conditions, including high-friction areas. Specify the assessment method and acceptance criteria before approving the sample. A tightly woven shell swatch alone does not confirm the behavior of the filled and sewn jacket.
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