5603.94.90.10 - Impregnated, coated or covered with material other than or in addition to rubber, plastics, wood pulp or glass fibers; "imitation suede" (223)

This HTS classification, 5603.94.90.10, encompasses nonwoven fabrics that are not made from cellulosic materials or glass fibers, and weigh more than 150 grams per square meter. These nonwovens are further distinguished by being impregnated, coated, or covered with materials beyond rubber, plastics, wood pulp, or glass fibers. A key characteristic here is the presence of additional finishing materials or treatments that impart specific properties, such as enhanced durability, water resistance, or aesthetic qualities, differentiating them from simpler nonwoven structures.

Within the broader category of "Other" nonwovens weighing more than 150 g/m², this specific code focuses on those with a secondary impregnation, coating, or covering. While sibling categories might cover nonwovens with different types of coatings or treatments (or none at all), this classification specifically applies to those where the added material is something other than the common polymers, rubber, or glass fibers typically used in nonwoven manufacturing. The "imitation suede" descriptor highlights a common end-use or aesthetic characteristic of materials falling under this code, but the primary classification driver remains the composition and treatment of the nonwoven fabric itself. As this is a leaf node in the HTS structure, it represents the most granular level of classification for these specific types of nonwoven materials.