Longer bundles were also frequently observed in the suspensions. Second, the bundle was organized of aligned cellulose nanofibers with 2–5 nm widths. The ends of single cellulose nanofibers inside the bundles were also difficult to observe. Third, several individualized nanofibers and slender bundles were attached on the surfaces of the big bundle. Fourth, the bundle was interconnected with other nanofibers and nanofiber bundles, forming a web-like, entangled network in the suspension.