A manufactured fiber; the most popular types are polypropylene and polyethylene. They are abrasion resistant, color fast, quick drying, low static, resistant to deterioration from chemicals, mildew, perspiration, rot and weather. They resist dying so color must be added during the manufacturing process. Olefin fabrics are also stain and soil resistant, strong, sunlight resistant, wick moisture from the body, and are comfortable and lightweight. Olefin fiber is a generic description that covers all thermoplastic fibers derived from olefins (an alkene hydrocarbon). The name derives from the term olefiant gas, an early name for ethylene meaning “oil-forming.” Olefin fiber is used in all types of activewear, socks, thermal underwear, automotive interiors, indoor and outdoor carpets, upholstery, wall coverings and furniture..