Fibers are from plants or animal sources.
Staple fibers are lower quality, short fibers. Cellulosic fibers are fibers from plants. Filament fibers are long, continuous fibers of higher quality. Protein fibers are fibers derived from animals or insects.
Cotton is one of the most widely used fibers of all natural fibers. Some characteristics of cotton is it's cool to wear, wrinkles easily, and is absorbent. Proper care for cotton is wash in the washing machine and iron with a warm to hot iron. Common uses of cotton are socks, underwear, jeans, ect.
Wool's primary sources are Australia, South America, New Zealand, and United Kingdom. Characteristics of wool is that it's soft and resilient, affected by moths, and it's naturally flame retardant. The proper care for wool is do not put in the dryer, press with a cool iron, and dry clean or hand wash in cool water and a mild detergent.
The characteristics durable and strong, lustrous and smooth, wrinkles easily, and can be expensive. The proper care is to hand was or dry clean and iron while damp.
The fine, lustrous fiber that comes from a cocoon spun by a silkworm. Characteristics of silk is that it's luxurious appearance and feel, drapes nicely, expensive, and it's the strongest of all natural fibers. The proper care is to dry clean or hand wash and press on wrong side with warm iron.