Polyester
From Conservapedia
Polyester is a polymer that is used to make synthetic fabric. It is one of the most common synthetic fabrics in use today, and can be used on its own, or blended with natural fibers, or blended with other man-made fibers, or blended with a mix of natura fibers and other man-made fibers. Clothes commonly made from polyester include shirts, football shirts, trousers, socks and suits, although the latter are often considered unattractive and undesirable.
Polyester has great advantages when traveling on long trips, since it does not crease easily and does not need much ironing.