Kapok is a type of fiber derived from the seed pods of the ceiba tree, native to tropical regions of South America, Africa, and Southeast Asia. It is a lightweight, buoyant material that is often used as a stuffing for mattresses, pillows, and life preservers. COTTON, on the other hand, is a soft, fluffy staple fiber that grows in a boll around the seeds of the COTTON plants. It is most commonly used to make fabric for clothing and other textiles.