Shirts of knitted or crocheted man-made fibers, wool, or other non-cotton textiles for men and boys occupy a distinct classification from their cotton counterparts, with fiber content driving both the tariff rate and any applicable trade-remedy exposure. Synthetic-fiber knit shirts — particularly those of polyester — are a commercially significant subset, often sourced from Southeast Asian manufacturing hubs. Accurate fiber-content labeling under the Textile Fiber Products Identification Act is a compliance prerequisite at US entry.

AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.