CN code 620590 covers men's and boys' shirts of other textile materials not assigned to subheadings 620510 (silk), 620520 (cotton), and 620530 (synthetic fibers). This heading classifies shirts of linen, artificial fibers (viscose, lyocell, modal), wool, and multi-fiber blends where none of the specified fibers dominate by weight. Linen shirts form a popular segment of summer and casual wear. Viscose shirts are gaining importance. Classification requires examining the dominant fiber and confirming shirt characteristics.

Shirts under code 620590 are subject to labeling requirements of Regulation (EU) No 1007/2011 with generic fiber names. REACH requirements apply to fiber-type-specific dyes. Cellulosic fabrics (linen, viscose, lyocell) face formaldehyde limits. Shirts in direct contact with skin face stricter chemical requirements. Metal components must comply with nickel limits. The GPSR requires traceability and safety documentation.

Shirts under code 620590 are imported from various countries. Linen shirts from China and European countries, viscose shirts from China and India. Origin rules require double transformation. Customs documentation must precisely describe the material. Binding Tariff Information is recommended for multi-fiber blends. Tariff preferences depend on the country of origin.

CN 6205 90 covers men's shirts from textile materials not assigned to subheadings 6205 20 (cotton) and 6205 30 (synthetic). Linen and natural silk shirts dominate, representing the premium segment. Linen shirts are valued for natural thermoregulatory properties and durability. Silk shirts are luxury products with higher customs value. Importers should attach fibre composition analysis to confirm classification under this residual subheading.