- Letter O
A lightweight, synthetic fabric with a wool-like feel. Olefin is created when polymers are melted into a liquid and then run through a machine called a spinneret, which forces the long fiber through small holes. Fibers are then woven into fabric. Olefin is quick-drying, colorfast and resistant to deterioration. Relatively easy to care for, olefin is used in everything from activewear to carpeting. Polypropylene is a common form of olefin found in apparel.