Exodus 28:2
2-5. holy garments—No inherent holiness belonged either to the material or the workmanship. But they are called "holy" simply because they were not worn on ordinary occasions, but assumed in the discharge of the sacred functions (Eze 44:19).
for glory and for beauty—It was a grand and sumptuous attire. In material, elaborate embroidery, and color, it had an imposing splendor. The tabernacle being adapted to the infantine aid of the church, it was right and necessary that the priests' garments should be of such superb and dazzling appearance, that the people might be inspired with a due respect for the ministers as well as the rites of religion. But they had also a further meaning; for being all made of linen, they were symbolical of the truth, purity, and other qualities in Christ that rendered Him such a high priest as became us.Exodus 28:4
Exodus 28:31
31-33. the robe of the ephod all of blue—It was the middle garment, under the ephod and above the coat. It had a hole through which the head was thrust, and was formed carefully of one piece, such as was the robe of Christ (Joh 19:23). The high priest's was of a sky-blue color. The binding at the neck was strongly woven, and it terminated below in a fringe, made of blue, purple, and scarlet tassels, in the form of a pomegranate, interspersed with small bells of gold, which tinkled as the wearer was in motion.