1)
What are "Bigdei Chofesh l'Richbah"?
1.
Rashi citing Targum Yonasan: It is dear garments for chariots (Radak ? to adorn them). Malbim ? they made them from the spun matters that Bnei Dan brought to Tzor.
2.
Radak: They are dear and proper for free people.