cho.shen is a garment component worn by Aaron, made with fittings and kept bound to the ephod.

The term consistently denotes a specified garment component: materials are supplied for it, it is made with gold rings and cords, attached to the ephod, worn by Aaron, and used to hold items while bearing the names of Israel.

1. Aaron's fitted garment component · dominant

   The singular noun identifies an item made as part of Aaron's garments: in Exodus 28:23 the APB renders instructions for gold rings at its two ends, and in Exodus 28:28 it renders the item as bound by its rings to the ephod so that it will not be removed. In Exodus 28:29 the item bears the names of Israel upon Aaron's heart, while Exodus 28:30 places the Urim and Thummim into it; Exodus 39:9 also describes it as squared and doubled.

   Exodus 28:23Exodus 28:28Exodus 28:29Exodus 28:30Exodus 39:9Leviticus 8:8

In the Anselm Project Bible: Across the occurrences, the APB consistently presents the item as “the breastpiece,” including its construction, attachment to the ephod, and placement on Aaron. This repeated rendering accords with the verses' description of a fitted and usable garment item.