Cotton Silk is a combination of two widely used fabrics – Cotton and Silk. ... Belonging to no single tradition, this hybrid fabric has been accepted widely across the world. It is definitely a cheaper version of Silk but, a more popular fabric than pure Silk itself. Silk obtained from silkworm and cotton obtained from cotton plants combine together to form the cotton silk fabric. Silk cotton fabric is a blend of both fibres, combining positive characteristics of each into a single textile. Cotton silk clothes are lightweight, silky and have a comfortable weave.