9902.12.09 - Back-shell style smartphone cases of hard plastics, each incorporating flexible rubber over command buttons and specially fitted rigid plastic clip with adjustable neoprene fabric armband (provided for in subheading 3926.90.99).

This HTS category, 9902.12.09, is specifically designated for "Back-shell style smartphone cases of hard plastics, each incorporating flexible rubber over command buttons and specially fitted rigid plastic clip with adjustable neoprene fabric armband." These are protective enclosures for smartphones that include integrated features like rubberized button covers for improved tactile feel and a durable plastic clip designed to hold the smartphone, often for hands-free use, which is further secured by an adjustable armband made of neoprene fabric. The inclusion of these specific components distinguishes these cases from simpler, unadorned smartphone covers.

As this is a leaf node within Chapter 99, there are no direct subcategories to introduce. Instead, the classification relies on the precise textual description to ensure accuracy. This detailed description effectively differentiates these specialized smartphone cases from more general plastic articles or accessories not designed for smartphone protection and portability in this integrated manner. The reference to subheading 3926.90.99 in the description indicates that the primary material component (hard plastics) would otherwise fall under a more general classification for shaped or molded plastic articles, but the specific design and intended use of this product warrant its placement within this temporary or special provision.