“Fine linen” (byssus) is here first spoken of as used for dress. It seems to have been reserved for nobles of the highest rank Esther 8:15, for kings, and for priests 2 Chronicles 5:12. David’s robe was probably worn, like that of the high priest, immediately under the ephod, and may, like that, have reached the feet.
Related Commentaries of 1 Chronicles 15:27
1 Chronicles 15:27
27 And David was clothed with a robe of fine linen, and all the Levites that bare the ark, and the singers, and Chenaniah the master of the songb with the singers: David also had upon him an ephod of linen.