Heading 5811 applies to quilted material sold in continuous lengths or uncut form, intended for further manufacturing. Finished quilts cut and sewn to their final dimensions for use as bedding or throws are made-up textile articles that classify in Chapter 63. The key test is whether the article has been made up into its final form or remains in the piece for further processing.

Yes, provided it is sold in the piece and has not been cut or assembled into a garment. Once cut to shape for a specific garment, it may be considered a made-up article. Importers sourcing quilted shell fabric for apparel production should confirm the goods are in continuous lengths and document their intended industrial use.