Reliance on a single supplier country — in this case Italy — creates concentration risk: any disruption from logistics, currency shifts, or production capacity constraints directly affects availability. Buyers of ultra-fine blended yarn at this count range should assess whether alternative European or Asian mills can meet the required specifications as a contingency.

Yes. Combed multiple yarn above 80 NM per single yarn would fall under heading 520645 rather than 520635. At very fine counts, the visual and tactile difference between combed and uncombed fiber can be subtle, so importers should obtain explicit mill documentation confirming whether the fiber was combed prior to spinning to ensure correct classification.