Here are the materials from the Sofia collection:

Silk:

056 – Black Silk
090 – White Silk
332 – Light Gray Silk
330 – Dark Gray Silk
333 – Ash Pink Silk
331 – Slate Silk

touchflex

216 – Ivory
220 – Satin Ash
221 – Silk Oak
222 – Pecan
223 – Rocky Oak
224 – Gray

Those who work in V-Ray versions lower than 3.1 be careful in the materials in the BRDF section there is Microfaset GTR ( GGX ) if your version is older than 3.1 then the BRDF field will be empty. Choose Blinn Phong or Ward – whatever suits you best.