The Rabbis taught in a Baraita that the Tabernacle's lower curtains were made of blue wool, purple wool, crimson wool, and fine linen, while the upper curtains that made the tent spread were made of goats' hair. And they taught that the upper curtains required greater skill than the lower, for says of the lower ones, "And all the women that were wise-hearted did spin with their hands," while says of the upper ones, "And all the women whose heart stirred them up in wisdom spun the goats." It was taught in Rabbi Nehemiah's name that the hair was washed on the goats and spun while still on the goats.