Abstract: A process is provided for producing novel convoluted, fiberized substantially nonfibrillated, cellulose fibers and novel sheet products from low moisture-content cellulose pulp, at a high through-put rate, which includes the application of contortive forces to a pulp mass under controlled operating conditions, wherein the feed rate, work space gap, and relative rate of movement of the working elements applying the contortive forces are correlated to maintain the work space filled with fibers under sufficient compression. Sheets made from these fibers exhibit excellent bulk, softness and absorbency properties, even when the formation process is conducted in an aqueous system, and even when substantial compacting forces are applied to the wet web processing.