LINEN
is an incredibly strong and natural fiber made from the flax plant. Linen is very absorbant and dries faster than cotton. Because it is so breathable and resilient, it is ideal for hot weather. Another characteristic is its tendency to wrinkle. Linen is one of the oldest found natural fibers, with remnants from a cave in Georgia dating back over 30,000 years.
"30,000-Year-Old Wild Flax Fibers" via Science.org