פּירוש אויף בראשית 27:15

החמדות THE COSTLY GARMENTS — the clean ones, as the Targum has it, דכיתא (clean); (cf. Rashbam). Another explanation: They are called חמדות literally, coveted ones, because he had coveted them from Nimrod (who also was a hunter; cf. Genesis 10:9) (Genesis Rabbah 65:16)

החמודות, “the valuable ones, the new ones with which Esau wants to impress the people with whom he deals. They are the ones which he wears when he performs tasks his father asks him to perform.” And that is why Yitzchok could smell them, for the smell of new clothes is noticeable. A different exegesis: החמודות, the one he wears always when he goes out hunting to kill venison. Your father is familiar with the smell of these garments and will not question the identity of the wearer of them. [This makes little sense to me, as Esau had already left on his errand to hunt game to feed his father. He would not likely have possessed two such sets of garments. Ed.]

החמודות, “the choice ones;” these garments had pictures of all the animals and birds in the world painted outside in a manner that the viewer considered these creatures as being alive. Whenever the wearer walked in the field, the animals in that region were attracted by these pictures so that they were easy prey for the hunter. Esau had taken them from Nimrod, when he slew him (B’reshit Rabbah 65,16). According to this Midrash it is difficult to understand why Yaakov would dress up in those clothes. We must assume that Rivkah was anxious for Yaakov to appear as much as possible like his brother Esau.