Charles Ellicott Commentary Exodus 39:28

"and the mitre of fine linen, and the goodly head-tires of fine linen, and the linen breeches of fine twined linen," — Exodus 39:28 (ASV)

A mitre ... and goodly bonnets. —The “mitre,” or rather “turban,” was for Aaron, the “goodly bonnets,” or rather “caps,” for his sons. (See the Notes on Exodus 28:36-40.)

Linen breeches. —Rather, linen drawers. These were to be made both for Aaron and for his sons. (See Exodus 28:42-43.)