Textile roller blinds and interior blinds made of fabric are generally classified under heading 6303. However, blinds made primarily of plastics, wood, or metal are classified in their respective material chapters rather than in Chapter 63. For composite blinds with both textile and non-textile components, the essential character of the article determines classification.

Fire-retardant finishing does not change the heading classification — treated curtains remain under 6303. However, the treatment may affect the applicable tariff line if it involves a coating or impregnation that changes the fabric's character, and it may trigger additional compliance documentation for commercial or hospitality buyers subject to building-code requirements. Importers should confirm that treatment certifications (such as NFPA 701) accompany the shipment when required by the end customer.