There is a relic of early humanity in the windows of basically every modern fashion outlet every summer. After years of cotton being the ideal textile for breezy summer clothing, the world’s oldest fiber has finally come back into fashion: linen. This natural beauty, along with wool, was the most used textile for clothing up until the Industrial Revolution, and despite the overwhelming amount of synthetically made fibers, it remains in demand to this day. What exactly is this ancient material, and how has it managed to stay relevant and desirable?