Two gold rings were also to be sewn on to the ephod, low down and in front, so as just to appear above the “curious girdle of the ephod,” and the lower rings of the breastplate were to be laced to these rings by a “lace of blue.” The breastplate was thus securely attached to the ephod, and showed above the “curious girdle” without covering it.
Related Commentaries of Exodus 28:27
Exodus 28:27-28
27 And two other rings of gold thou shalt make, and shalt put them on the two sides of the ephod underneath, toward the forepart thereof, over against the other coupling thereof, above the curious girdle of the ephod.
28 And they shall bind the breastplate by the rings thereof unto the rings of the ephod with a lace of blue, that it may be above the curious girdle of the ephod, and that the breastplate be not loosed from the ephod.