Pure Cashmere or Wool Blend? Lab Results on Warmth, Pilling, and Durability

I run a scarf factory in China and share lab data to cut through the marketing noise. Tests show pure cashmere is about 30% warmer (0.045 vs 0.052 CLO) but pills more (grade 3.5 vs grade 4+). A 70/30 wool/cashmere blend reduces pilling complaints by 70% while retaining 80% of the soft hand feel. For luxury gifts or low-wear items, 100% cashmere wins. For daily or travel use, a blend is smarter. One US outdoor brand cut returns from 8% to 1.2% by switching to 70/30. Always ask suppliers for ISO 12945-2 pilling grades, third-party micron tests, and samples washed 10 times. If they hesitate, walk away. I’ve done this for 15+ years—what’s your experience? Any horror stories?

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