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SITCSection 6
U.S. imports of woven synthetic filament fabric, mixed mainly with cotton (under 85% synthetic) (SITC 65318) totaled $759K in April 2026, traded with 22 countries.
Importers of Woven Synthetic Filament Fabric, Mixed Mainly with Cotton (Under 85% Synthetic) paid $174K in duties in April 2026 — an effective duty rate of 24% on $729K in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataPoly-cotton blended woven fabrics — where synthetic filaments are present but fall below the 85% threshold and cotton is the principal secondary fiber — occupy this classification, reflecting the commercial importance of blended shirting, workwear, and home-textile constructions. The 'mixed mainly with cotton' qualifier is the decisive specification: if the secondary fiber is wool, viscose, or another material rather than cotton, a different heading applies. Importers should note that blended fabrics can be subject to both textile quota history considerations and Section 301 tariff exposure depending on the country of origin. Fiber-content certification from the mill is essential to substantiate the blend ratio at entry.
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'Mixed mainly with cotton' means cotton is the predominant fiber among those other than the synthetic filament component. If a fabric contains 60% synthetic filament, 25% cotton, and 15% viscose, cotton is the largest secondary fiber, so the fabric would qualify as mixed mainly with cotton. If viscose exceeded cotton's share, the fabric would fall into a different blended-fabric classification.
For the filament-based blended fabrics in SITC 65318, no specific g/m² threshold is built into the classification itself — unlike the staple-fiber blended categories (e.g., SITC 65331/65332) where a 170 g/m² cutoff applies. However, at the HTS 10-digit level, weight limits may still differentiate duty rates, so importers should verify the applicable HTS subheadings for their specific fabric weight.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| INDIA | $411K | -- | -$411K |
| MEXICO | $46K | $155K | +$109K |
| COSTA RICA | -- | $171K | +$171K |
| SINGAPORE | -- | $141K | +$141K |
| SLOVENIA | -- | $118K | +$118K |
Monthly import values over time