Woven nightshirts and pajamas for men and boys are classified separately from knitted sleepwear, and the distinction carries real duty consequences since the two construction types fall under different HTS chapters. Fiber content—particularly whether the garment is cotton, silk, or man-made fiber—determines the specific 10-digit tariff line and associated rate. Sleepwear for children is also subject to Consumer Product Safety Commission flammability standards, which importers must satisfy before goods can be released into US commerce.

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