Conventional woven fabrics are produced by interlacing yarns at right angles through a loom. Bonded parallel-yarn fabrics instead lay yarns in parallel arrays and bond the layers together without interlacing, producing a structure with higher directional tensile strength and lower crimp. This construction difference is the basis for their separate classification and makes them preferred reinforcement materials in composite and geotechnical applications.

Common bonding methods include adhesive lamination, thermal fusion, and stitch-bonding with a carrier yarn. The SITC heading does not differentiate by bonding method, but at the HTS 10-digit level, the specific construction and bonding technique may influence which subheading applies. Importers should provide full technical specifications — including bonding method, filament type, and layer count — to their customs broker for accurate classification.