Various methods have been developed to bind fibers into nonwoven fabrics. These methods use unique mechanisms for attachment of fibers within the nonwoven. Properties of the fabric depend on how well these processes perform. Some early methods that were used for binding synthetic fibers do not work efficiently when cotton fibers are blended into the fiber matrix. Examination of nonwoven fabrics at magnifications high enough to identify individual fibers allows visualization of mechanisms of fiber interactions that hold the nonwovens together. Examples of various processes such as entanglement, melt bonding, or chemical bonding will be discussed, as well as the effects of these processes on the fibers used to fabricate the nonwoven.