A knitted ensemble under heading 6103 consists of two or more garments put up for retail sale together, made of the same fabric, and intended to be worn together. If the pieces are sold separately or made of different fabrics, they are classified individually under the appropriate garment heading. CBP's classification of coordinated sets often turns on how they are packaged and presented at importation.

Heading 6103 explicitly excludes swimwear. Athletic shorts that are not designed or marketed as swimwear — lacking features such as a mesh liner, quick-dry coating, or water-resistant treatment typical of swimwear — generally classify under 6103. Shorts with swimwear characteristics would move to the appropriate swimwear heading. The garment's design features and intended use are the key classification factors.