Line 6204396000 covers suit-type jackets of silk where silk constitutes 70% or more of the fabric by weight. Line 6204398050 captures other-silk jackets — those where silk is present but below the 70% threshold. The distinction matters because the two lines may carry different duty rates and statistical tracking. A certified fiber-content analysis from the fabric mill is the standard documentation to support whichever line is declared.

Lines 6204398010, 6204398020, and 6204398030 cover suit-type jackets of 'other textile materials' that are subject to cotton, wool, and MMF restraint categories respectively. These lines exist to capture garments made from materials not covered by the primary fiber headings (wool, cotton, synthetic, artificial, silk) but which still fall under textile trade restraint frameworks. Importers of jackets made from specialty fibers — such as ramie, hemp, or novel blends — should evaluate whether a restraint category applies before filing entry.