CPSC flammability standards for children's sleepwear apply to garments in sizes 0–14, which can include girls' pajamas. Adult women's sleepwear is not subject to the same mandatory standard, though importers of girls' sizes must ensure compliance with 16 CFR Parts 1615 and 1616 before entry. Consulting a product safety specialist is advisable for mixed-size shipments.

At the 10-digit HTS level, woven pajamas are typically subdivided by dominant fiber — cotton, man-made fiber, silk, and other fibers each carry distinct subheadings and duty rates. The dominant fiber is determined by weight, and the manufacturer's fiber content declaration must match lab-testable composition to avoid reclassification at the port.