Linen

Boyd’s Bible Dictionary:

(flax). Used for stately robes (Gen. 41:4242And Pharaoh took off his ring from his hand, and put it upon Joseph's hand, and arrayed him in vestures of fine linen, and put a gold chain about his neck; (Genesis 41:42)); priestly vestments (Ex. 28:4242And thou shalt make them linen breeches to cover their nakedness; from the loins even unto the thighs they shall reach: (Exodus 28:42); Lev. 6:1010And the priest shall put on his linen garment, and his linen breeches shall he put upon his flesh, and take up the ashes which the fire hath consumed with the burnt offering on the altar, and he shall put them beside the altar. (Leviticus 6:10)); temple veil (2 Chron. 3:1414And he made the vail of blue, and purple, and crimson, and fine linen, and wrought cherubims thereon. (2 Chronicles 3:14)); choral gowns (2 Chron. 5:1212Also the Levites which were the singers, all of them of Asaph, of Heman, of Jeduthun, with their sons and their brethren, being arrayed in white linen, having cymbals and psalteries and harps, stood at the east end of the altar, and with them an hundred and twenty priests sounding with trumpets:) (2 Chronicles 5:12)), and ordinary dress. Symbol of purity (Rev. 15:66And the seven angels came out of the temple, having the seven plagues, clothed in pure and white linen, and having their breasts girded with golden girdles. (Revelation 15:6)); of luxury (Luke 16:1919There was a certain rich man, which was clothed in purple and fine linen, and fared sumptuously every day: (Luke 16:19)).

Concise Bible Dictionary:

Linen
Various Hebrew and Greek words are translated “linen,” and there can be no doubt that linen made of flax was known in ancient Egypt and to the Israelites; but cloths generally are called “linen” whether made of cotton or flax, some being distinguished as “fine linen,” such as was worn by the priests, kings. The word shesh, often translated “fine linen” and “fine twined linen” (for the curtains of the tabernacle, etc.) signifies “whiteness,” and is applicable to both fine linen and cotton (Ex. 26:1,311Moreover thou shalt make the tabernacle with ten curtains of fine twined linen, and blue, and purple, and scarlet: with cherubims of cunning work shalt thou make them. (Exodus 26:1)
31And thou shalt make a vail of blue, and purple, and scarlet, and fine twined linen of cunning work: with cherubims shall it be made: (Exodus 26:31)). Joseph was arrayed in “vestures of fine linen” (Gen. 41:4242And Pharaoh took off his ring from his hand, and put it upon Joseph's hand, and arrayed him in vestures of fine linen, and put a gold chain about his neck; (Genesis 41:42)). The wrappings on the ancient Egyptian mummies were for a long time judged to be cotton, but by the use of the microscope they have been discovered to be linen.