פירוש על שמות 28:4

חשן A BREAST-PLATE — an ornament borne in front of the heart.

ואלה הבגדים, And these are the garments, etc. Why does this verse list only six out of the eight priestly garments, omitting mention of the pants and the High Priest's ציץ, golden headband? Perhaps the missing garments have been alluded to already.The headband may have been alluded to in verse three as included in the line: "and they will make Aaron's garments to sanctify him." The words: "the garments of Aaron" in that verse were not really necessary; it would have sufficed to say: "and these are the garments, etc." The exclusive mention of Aaron alludes to the headband which was worn only by the High Priest. The reason it is mentioned together with the other garments is that it alone would not be able to perform any function. Aaron's (The High Priest's) eight garments performed their function only if all of them were worn by the High Priest at one time. This is also the justification for the conjunctive letter ו before the word אלה, "these." At first glance that letter appeared to have referred to other garments over and above the eight garments listed in the Torah at this stage. Actually, it only suggests that all the garments that were now being mentioned were interdependent on each other, essential. As far as the pants are concerned, we find an entirely unnecessary line at the end of verse four, i.e. "and they will make sacred garments for your brother Aaron and for his sons so that he will be a priest unto Me." Seeing that this line was unnecessary, we may see in it a veiled reference to the pants. Both Aaron and his sons are mentioned in that line as both he and his sons had to wear pants beneath their long tunics.

ואלה הבגדים, they are all listed individually.