Abstract: An apparatus for washing or otherwise wet-processing natural fibers in loose or “bulk” form comprises a generally cylindrical bag having cinch-type closures at both ends. The bag is doubled upon itself to form a generally annular cavity for holding the fibers. The inner cinch secures the first opening of the bag above the agitator of a conventional washing machine. After the fibers are placed into the bag, the outer cinch is secured, also above the agitator, thereby containing the fibers during selected washing or rinsing operations. The mesh size of the bag is selected to provide adequate fluid flow through the fibers while minimizing loss of the fibers or clogging of the plumbing. The two cinches are preferably tied together so that the bag and contents may be easily handled as a unit and hung as a unit for air drying.