What Kinds of Materials Make for Soft Yarn? There are many materials that contribute to the softness of yarn. Some soft yarn is spun with animal fibers that are naturally soft to the touch, such as alpaca, angora, cashmere, and Merino wool. Many types of plant fiber are treated with chemicals or mechanically processed to enhance their softness. Other types of soft yarn have a silky texture because they contain soft man-made fibers, like Modal, Lyocell, and rayon. Article Source: http://issuu.com/sallybramirez/docs/what_kinds_of_materials_make_for_so/1