Charles Ellicott Commentary Genesis 27:15

"And Rebekah took the goodly garments of Esau her elder son, which were with her in the house, and put them upon Jacob her younger son." — Genesis 27:15 (ASV)

Fine clothing. —It has been supposed that the elder son held a sort of priestly office in the household, and as Isaac’s sight was growing dim, that Esau ministered for him at sacrifices. Evidently the clothing was something special, and such as was peculiar to Esau: for ordinary clothing, however handsome, would not have been kept in the mother’s tent, but in that of Esau or of one of his wives.