The surface contour of the fiber characterizes its outer surface along its shaft and may be rough, smooth, scaly, serrated, convoluted, or striated, all of which contribute to the friction, softness, and texture.
The property is important for the texture and feel of the fabric that is made.
[1][2] Natural fibers, like cotton and wool, have a staple length and irregular, void-filled surface contours.
The rough surface aids in the capture of fine particles.
[3] The fiber's microstructures include its cross section shape and surface contour.