9902.13.44 - Men's shirts of man-made fibers, knitted or crocheted, with textile- or polymer-based electrodes knitted into or attached to the fabric, incorporating two snaps designed to secure a module to transmit heart rate information from the electrodes to a compatible monitor (provided for in subheading 6105.20.20)

This HTS category, 9902.13.44, is a specialized provision for men's shirts crafted from man-made fibers. The key defining features are the integration of textile- or polymer-based electrodes, either knitted into or attached to the fabric, and the presence of two snaps. These components are specifically designed to facilitate the attachment of a module that transmits heart rate information to a compatible monitor. Therefore, this classification targets smart garments intended for health monitoring purposes, distinguishing them from standard apparel.

Unlike other categories within Chapter 99, which often cover temporary legislation or trade agreement modifications, this specific subheading addresses a particular type of technologically enhanced garment. While other siblings might relate to different temporary import restrictions or special provisions, 9902.13.44 is solely dedicated to the precise product described, emphasizing its unique functional design. The reference to subheading 6105.20.20 indicates that the underlying garment construction falls within the general classification for knitted or crocheted men's shirts of man-made fibers, with this 9900 series code adding a layer of specific functional and technological classification.

As this is a leaf node, there are no further subcategories within 9902.13.44. This means that all shirts meeting the detailed description—men's, man-made fibers, knitted or crocheted, with integrated electrodes and snaps for heart rate monitoring—will be classified under this specific HTS code. The classification hinges on the presence of all these functional elements, serving to isolate these specialized garments from standard apparel and other potentially related, but less technologically integrated, textile products.