A hose reinforced with a combination of textile fibers — including high-performance fibers like aramid — where the reinforcement layer is entirely fibrous/textile in nature would likely still fall under the textile-reinforced headings (400931 or 400932). Heading 400941 is intended for reinforcement with non-textile, non-metal materials or combinations that take the product outside the textile-only and metal-only categories. The specific construction and CBP's interpretation of the dominant reinforcing material determine the correct heading; a binding ruling is advisable for novel composites.

Fiberglass is generally not considered a textile material for HTS Chapter 40 classification purposes — textile materials in this context refer to organic fiber-based woven, braided, or knitted structures. Fiberglass-reinforced rubber hose would therefore fall under the 'other materials' category, placing it under 400941 (without fittings) or 400942 (with fittings), not under the textile-reinforced headings.