As professionals of the fashion and clothing industry, we are often called to ask ourselves the following questions: What fiber or blend best meets the needs of my customer? Or: Does a specific fiber meets their needs? The Guide to Textile Fibers (GTF) works in two ways: first, by comparing the different fibers to one another using a comparator. The second is focusing on each of the fibers through datasheets. These technical datasheets are designed to allow the reader to quickly find the information they want. They are structured, concise and organized to increase search speed. The purpose of the GTF is primarily to serve as a reference tool for professionals and students of fashion and clothing industry. However, nothing prevents it to also be a tool of discovery and learning.