Lounge pants and pajama bottoms intended for sleepwear or lounging at home classify under heading 6107 (nightwear and similar articles). Trousers designed for outerwear use — even if casual — classify under heading 6103. The garment's design, fabric weight, and intended use (sleepwear versus outerwear) are the determining factors, and CBP has issued rulings distinguishing lounge pants from casual trousers.

Bathrobes and dressing gowns under 610791 and 610799 are garments designed to be worn in the home, typically after bathing or as loungewear. They are distinguished from outerwear robes or coats by their construction (often terry or waffle-knit cotton, or lightweight manmade fiber), their typical length, and belt or tie closure. A garment marketed and designed as a bathrobe classifies here regardless of whether it could theoretically be worn outdoors.