SEED POD of a KAPOK tree (Ceiba pentandra), a tropical tree native to Mexico, Central America and the Caribbean, northern South America. Kapok also refers to the cotton obtained from its seed pods. The fiber is light, very buoyant, resilient, resistant to water but it is very flammable. Harvesting and separating the fiber is labor-intensive and manual. It is used as an alternative to down as filling in mattresses, pillows, upholstery, and stuffed toys.